{"id":8093,"date":"2026-05-27T14:30:38","date_gmt":"2026-05-27T06:30:38","guid":{"rendered":"https:\/\/www.bmagmeter.com\/?p=8093"},"modified":"2026-05-27T14:48:39","modified_gmt":"2026-05-27T06:48:39","slug":"class-b-water-meter-a-friendly-guide","status":"publish","type":"post","link":"https:\/\/www.bmagmeter.com\/it\/class-b-water-meter-a-friendly-guide\/","title":{"rendered":"Class B Water Meter &#8211; A Friendly Guide"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"8093\" class=\"elementor elementor-8093\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-0d8b288 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"0d8b288\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-03c84ad\" data-id=\"03c84ad\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3f5bfd4 elementor-widget elementor-widget-text-editor\" data-id=\"3f5bfd4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Classe B <a href=\"https:\/\/www.bmagmeter.com\/it\/\"><u>contatore dell'acqua<\/u><\/a>\u00a0remains one of the most widely used mechanical water meter types for residential and light commercial water metering due to its balanced combination of accuracy, cost-effectiveness, and long-term operational reliability.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-38d2ab2 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"38d2ab2\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-2009a09\" data-id=\"2009a09\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-410dc56 elementor-widget elementor-widget-heading\" data-id=\"410dc56\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What is a Class B Water Meter?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8b86c0a elementor-widget elementor-widget-text-editor\" data-id=\"8b86c0a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>A Class B water meter is an older accuracy class used in older international standards (such as ISO 4064:1993). Under these older standards, water meters were classified into four accuracy classes\u2014A, B, C, and D\u2014based on their measurement performance, with performance typically increasing from Class A to Class D.<\/p><ul><li><strong>Class A:<\/strong>Lowest performance, narrowest measurement range.<\/li><li><strong>Class B:<\/strong>Balances performance, sensitivity, and cost.<\/li><li><strong>Class C \/ D:<\/strong>High-performance classes, typically used in applications with strict requirements for low-flow measurement.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1eb66ac elementor-widget elementor-widget-image\" data-id=\"1eb66ac\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"300\" height=\"260\" src=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/05\/Class-B-Water-Meter-300x260.webp\" class=\"attachment-medium size-medium wp-image-8095\" alt=\"Class B Water Meter\" srcset=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/05\/Class-B-Water-Meter-300x260.webp 300w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/05\/Class-B-Water-Meter-14x12.webp 14w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/05\/Class-B-Water-Meter.webp 508w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8e68e7a elementor-widget elementor-widget-text-editor\" data-id=\"8e68e7a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>As Class B water meters can meet the metering needs of most residential and general commercial settings, they have long been the mainstream type for residential and light commercial applications. Precisely because of their widespread use, even though international standards have been updated, many manufacturers, distributors, and end users still habitually use \u201cClass B\u201d to describe water meters suitable for routine metering scenarios with moderate performance.<\/p><p>The current international standard ISO 4064-1:2014 no longer uses the A\/B\/C\/D classification system for measurement classes, but instead uniformly adopts the classification method of \u201cAccuracy Class 1\u201d and \u201cAccuracy Class 2.\u201d The \u201cClass B water meter\u201d in older standards is generally considered to be broadly comparable to \u201cAccuracy Class 2\u201d in ISO 4064:2014, although the two systems are not directly equivalent. Additionally, the industry is gradually shifting toward using the R-value (range ratio) to measure water meter performance, such as R80, R100, and R160. In general market practice, Class B meters are often associated with R80-level performance, while Class C is commonly associated with R160, depending on the design and metering mechanism.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-01a16e9 elementor-widget elementor-widget-image\" data-id=\"01a16e9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"234\" height=\"240\" src=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/07\/ISO-Standards-ISO-4064-1-2024.webp\" class=\"attachment-medium size-medium wp-image-7201\" alt=\"ISO-Standards ISO 4064-1:2024\" srcset=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/07\/ISO-Standards-ISO-4064-1-2024.webp 234w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/07\/ISO-Standards-ISO-4064-1-2024-12x12.webp 12w\" sizes=\"(max-width: 234px) 100vw, 234px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-d961c12 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d961c12\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c93f501\" data-id=\"c93f501\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c943256 elementor-widget elementor-widget-heading\" data-id=\"c943256\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Advantages of Class B Water Meters<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-be1769c elementor-widget elementor-widget-text-editor\" data-id=\"be1769c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Compared to Class A accuracy, Class B offers higher measurement sensitivity and lower measurement error, providing more precise water volume measurement under various flow conditions and ensuring billing fairness.<\/p><p>Compared to Class C and Class D accuracy classes, Class B is more cost-effective. In the actual market, if the material, structure, and other parameters of the same water meter model are identical, and only the accuracy class is upgraded from Class B to Class C, the price difference is typically only about 5%.<\/p><p>From a procurement and operations perspective, as the mainstream product in the market, Class B water meters offer convenient spare part replacement and abundant supplier resources. They also comply with multiple international standards such as ISO 4064, OIML R49, and GB\/T 778, resulting in low long-term maintenance costs, making them the preferred solution for standard metering needs.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-bde81e2 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"bde81e2\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-a5f08a3\" data-id=\"a5f08a3\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7dbcac2 elementor-widget elementor-widget-heading\" data-id=\"7dbcac2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Class B Water Meter Product Recommendation<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e86d54c elementor-widget elementor-widget-text-editor\" data-id=\"e86d54c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>As one of China\u2019s leading water meter manufacturers, <a href=\"https:\/\/www.bmagmeter.com\/it\/\">Misuratore BMAG<\/a> has over 20 years of experience in water meter R&amp;D and export, with products sold in more than 80 countries and regions worldwide. We offer a variety of Class B water meter solutions compliant with international standards such as ISO 4064 and OIML R49.<\/p><p>For different application scenarios, BMAG provides a wide range of Class B product models, including single-jet, multi-jet, cold water meters, and hot water meters:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-98210d6 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"98210d6\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-ee1a5dc\" data-id=\"ee1a5dc\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-bee4d23 elementor-widget elementor-widget-image\" data-id=\"bee4d23\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.bmagmeter.com\/it\/prodotto\/stw02-1-contatore-acqua-a-getto-singolo-in-ottone-5\/\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/09\/Hot-Water-Meter-Single-Jet-Class-B-ISO4064-SJ-SDC-2-1024x1024.webp\" class=\"attachment-large size-large wp-image-7395\" alt=\"Contatore di acqua calda a getto singolo Classe B ISO4064 SJ-SDC\" srcset=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/09\/Hot-Water-Meter-Single-Jet-Class-B-ISO4064-SJ-SDC-2-1024x1024.webp 1024w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/09\/Hot-Water-Meter-Single-Jet-Class-B-ISO4064-SJ-SDC-2-300x300.webp 300w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/09\/Hot-Water-Meter-Single-Jet-Class-B-ISO4064-SJ-SDC-2-150x150.webp 150w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/09\/Hot-Water-Meter-Single-Jet-Class-B-ISO4064-SJ-SDC-2-768x768.webp 768w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/09\/Hot-Water-Meter-Single-Jet-Class-B-ISO4064-SJ-SDC-2-12x12.webp 12w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/09\/Hot-Water-Meter-Single-Jet-Class-B-ISO4064-SJ-SDC-2-600x600.webp 600w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/09\/Hot-Water-Meter-Single-Jet-Class-B-ISO4064-SJ-SDC-2-100x100.webp 100w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/09\/Hot-Water-Meter-Single-Jet-Class-B-ISO4064-SJ-SDC-2.webp 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Contatore di acqua calda a getto singolo | Classe B | ISO4064 | Rotante a 360\u00b0<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-46e1465\" data-id=\"46e1465\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-0a247a0 elementor-widget elementor-widget-image\" data-id=\"0a247a0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.bmagmeter.com\/it\/prodotto\/misuratore-dacqua-multigetto-in-plastica-mj-sdc-e-classe-c-r160\/\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/BMAG-MJ-SDC-E-Plastic-multijet-water-meter-2-1024x1024.webp\" class=\"attachment-large size-large wp-image-6421\" alt=\"BMAG MJ-SDC-E Contatore acqua multigetto in plastica\" srcset=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/BMAG-MJ-SDC-E-Plastic-multijet-water-meter-2-1024x1024.webp 1024w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/BMAG-MJ-SDC-E-Plastic-multijet-water-meter-2-300x300.webp 300w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/BMAG-MJ-SDC-E-Plastic-multijet-water-meter-2-150x150.webp 150w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/BMAG-MJ-SDC-E-Plastic-multijet-water-meter-2-768x768.webp 768w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/BMAG-MJ-SDC-E-Plastic-multijet-water-meter-2-12x12.webp 12w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/BMAG-MJ-SDC-E-Plastic-multijet-water-meter-2-600x600.webp 600w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/BMAG-MJ-SDC-E-Plastic-multijet-water-meter-2-100x100.webp 100w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/BMAG-MJ-SDC-E-Plastic-multijet-water-meter-2.webp 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Class B Plastic Multi jet Water Meter | R160 | IP68 Optional<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-7ff9aae\" data-id=\"7ff9aae\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9e914ef elementor-widget elementor-widget-image\" data-id=\"9e914ef\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.bmagmeter.com\/it\/prodotto\/contatore-dellacqua-a-secco-a-getto-multiplo-in-ottone-mj-sdc-e-2\/\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/07\/ISO-4064-Multi-Jet-Water-Meter-Bi-Directional-MTW-E2-1-1024x1024.webp\" class=\"attachment-large size-large wp-image-7256\" alt=\"ISO 4064 Misuratore d&#039;acqua multigetto bidirezionale MTW-E2\" srcset=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/07\/ISO-4064-Multi-Jet-Water-Meter-Bi-Directional-MTW-E2-1-1024x1024.webp 1024w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/07\/ISO-4064-Multi-Jet-Water-Meter-Bi-Directional-MTW-E2-1-300x300.webp 300w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/07\/ISO-4064-Multi-Jet-Water-Meter-Bi-Directional-MTW-E2-1-150x150.webp 150w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/07\/ISO-4064-Multi-Jet-Water-Meter-Bi-Directional-MTW-E2-1-768x768.webp 768w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/07\/ISO-4064-Multi-Jet-Water-Meter-Bi-Directional-MTW-E2-1-12x12.webp 12w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/07\/ISO-4064-Multi-Jet-Water-Meter-Bi-Directional-MTW-E2-1-600x600.webp 600w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/07\/ISO-4064-Multi-Jet-Water-Meter-Bi-Directional-MTW-E2-1-100x100.webp 100w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/07\/ISO-4064-Multi-Jet-Water-Meter-Bi-Directional-MTW-E2-1.webp 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">ISO 4064 Multi Jet Water Meter<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-120f0f3 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"120f0f3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjE4OTUiLCJ0b2dnbGUiOmZhbHNlfQ%3D%3D\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Contattaci<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-dafae97 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"dafae97\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-84832cb\" data-id=\"84832cb\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-09be8a1 elementor-widget elementor-widget-heading\" data-id=\"09be8a1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Class B Water Meter Common Technical Specifications &amp; Performance Parameters<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5cc8ab4 elementor-widget elementor-widget-text-editor\" data-id=\"5cc8ab4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>To accurately assess whether a Class B water meter is suitable for specific residential or commercial applications, it is essential to understand the relevant technical specifications and performance parameters prior to procurement. These parameters not only define the meter&#8217;s measurement capabilities and operational limits but also directly influence its long-term measurement accuracy, durability, and the overall operational efficiency of the system.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b0dcce3 elementor-widget elementor-widget-image\" data-id=\"b0dcce3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"282\" src=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/\u591a\u6d41\u8868-54\u5ea6\u76d8\u793a\u610f\u56fe-300x282.webp\" class=\"attachment-medium size-medium wp-image-4227\" alt=\"BMAG MJ-SDC-E Misuratore d&#039;acqua multigetto in plastica di classe B | R160 | IP68 Opzionale\" srcset=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/\u591a\u6d41\u8868-54\u5ea6\u76d8\u793a\u610f\u56fe-300x282.webp 300w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/\u591a\u6d41\u8868-54\u5ea6\u76d8\u793a\u610f\u56fe-13x12.webp 13w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/\u591a\u6d41\u8868-54\u5ea6\u76d8\u793a\u610f\u56fe-600x563.webp 600w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/\u591a\u6d41\u8868-54\u5ea6\u76d8\u793a\u610f\u56fe.webp 602w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6911ff0 elementor-widget elementor-widget-heading\" data-id=\"6911ff0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">1. Operating Flow Range &amp; Ratio<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cda6a8a elementor-widget elementor-widget-text-editor\" data-id=\"cda6a8a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The flow range parameters indicate the range of flow rates within which the water meter can maintain the specified measurement accuracy. According to ISO 4064, the operating flow range of a water meter is typically defined by four key parameters: Q1, Q2, Q3, and Q4. In addition to the basic flow parameters, modern water meter specifications also place significant emphasis on the R-value (range ratio or turndown ratio), which indicates the meter\u2019s low-flow measurement capability and overall measurement range.<\/p><p><strong>Learn About the Details of Water Meter Flow Rates &amp; Ratio Here:<\/strong>\u00a0<a href=\"https:\/\/www.bmagmeter.com\/it\/comprensione-delle-portate-dei-contatori-dacqua-q1-q2-q3-q4-e-del-rapporto-r\/\"><u>https:\/\/www.bmagmeter.com\/understanding-water-meter-flow-rates-q1-q2-q3-q4-and-r-ratio\/<\/u><\/a><\/p><p>\u00a0<\/p><p>The table below shows the typical operating flow range parameters for Class B water meters:<\/p><div style=\"overflow-x: auto;\"><table><tbody><tr><td width=\"50\"><strong>Misurare<\/strong><\/td><td width=\"73\"><strong>Unit<\/strong><\/td><td width=\"63\"><strong>Dn15<\/strong><\/td><td width=\"67\"><strong>Dn20<\/strong><\/td><td width=\"71\"><strong>Dn25<\/strong><\/td><td width=\"67\"><strong>Dn32<\/strong><\/td><td width=\"59\"><strong>Dn40<\/strong><\/td><td width=\"59\"><strong>Dn50<\/strong><\/td><\/tr><tr><td width=\"50\"><strong>R<\/strong><\/td><td width=\"73\"><strong>Q3\/Q1<\/strong><\/td><td colspan=\"6\" width=\"389\"><strong>80 <\/strong><\/td><\/tr><tr><td width=\"50\"><strong>Q4<\/strong><\/td><td width=\"73\"><strong>m\u00b3\/h<\/strong><\/td><td width=\"63\"><strong>3,125<\/strong><\/td><td width=\"67\"><strong>5,000<\/strong><\/td><td width=\"71\"><strong>7,875<\/strong><\/td><td width=\"67\"><strong>12,500<\/strong><\/td><td width=\"59\"><strong>20,000<\/strong><\/td><td width=\"59\"><strong>31,250<\/strong><\/td><\/tr><tr><td width=\"50\"><strong>Q3<\/strong><\/td><td width=\"73\"><strong>m\u00b3\/h<\/strong><\/td><td width=\"63\"><strong>2,500<\/strong><\/td><td width=\"67\"><strong>4,000<\/strong><\/td><td width=\"71\"><strong>6,300<\/strong><\/td><td width=\"67\"><strong>10,000<\/strong><\/td><td width=\"59\"><strong>16,000<\/strong><\/td><td width=\"59\"><strong>25,000<\/strong><\/td><\/tr><tr><td width=\"50\"><strong>Q2<\/strong><\/td><td width=\"73\"><strong>\u00a0\u00a0<\/strong><strong>L<\/strong><strong>\/h<\/strong><\/td><td width=\"63\"><strong>50 <\/strong><\/td><td width=\"67\"><strong>80 <\/strong><\/td><td width=\"71\"><strong>126 <\/strong><\/td><td width=\"67\"><strong>200 <\/strong><\/td><td width=\"59\"><strong>320 <\/strong><\/td><td width=\"59\"><strong>500 <\/strong><\/td><\/tr><tr><td width=\"50\"><strong>Q1<\/strong><\/td><td width=\"73\"><strong>\u00a0\u00a0<\/strong><strong>L<\/strong><strong>\/h<\/strong><\/td><td width=\"63\"><strong>31.25 <\/strong><\/td><td width=\"67\"><strong>50 <\/strong><\/td><td width=\"71\"><strong>78.75<\/strong><\/td><td width=\"67\"><strong>125 <\/strong><\/td><td width=\"59\"><strong>200 <\/strong><\/td><td width=\"59\"><strong>312.5\u00a0<\/strong><\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-52e9aa2 elementor-widget elementor-widget-heading\" data-id=\"52e9aa2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">2. Accuracy Bands<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-675728f elementor-widget elementor-widget-text-editor\" data-id=\"675728f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The Maximum Permissible Error (MPE) is the key criterion for assessing the measurement accuracy of water meters. ISO 4064 divides the operating flow range of water meters into a Lower Zone and an Upper Zone, and specifies different error limits for each zone.<\/p><p><strong>Learn More Knowledge About Water Meter Accuracy Class Here: <\/strong><a href=\"https:\/\/www.bmagmeter.com\/it\/comprensione-completa-dellaccuratezza-del-contatore-dellacqua-classe\/\"><u>https:\/\/www.bmagmeter.com\/comprehensive-understanding-water-meter-accuracy-class\/<\/u><\/a><\/p><p>For Class B water meters, the design focus is on achieving a balance between cost, stability, and metering performance in typical residential and commercial water usage scenarios. Therefore, their error standards are primarily set based on actual daily water usage conditions.<\/p><p><strong>Lower Zone (Q1 \u2264 Q &lt; Q2):<\/strong><\/p><p>At low flow rates, due to the reduced fluid driving force, the sensitivity requirements for the meter\u2019s internal measuring mechanism are higher; consequently, the standard allows for a relatively wider error range.<\/p><ul><li>Maximum permissible error: \u00b15%.<\/li><\/ul><p><strong>Upper Zone (Q2 \u2264 Q \u2264 Q4):<\/strong><\/p><p>The high-flow range is the water meter\u2019s primary and most common operating range, thus requiring higher measurement accuracy.<\/p><p>Maximum permissible error:<\/p><ul><li>Water temperature \u2264 30\u00b0C: \u00b12%<\/li><li>Water temperature &gt; 30\u00b0C: \u00b13%.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-91b9a28 elementor-widget elementor-widget-image\" data-id=\"91b9a28\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/10\/water-meter-accuracy-class-B-300x300.webp\" class=\"attachment-medium size-medium wp-image-5200\" alt=\"precisione del contatore d&#039;acqua classe B\" srcset=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/10\/water-meter-accuracy-class-B-300x300.webp 300w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/10\/water-meter-accuracy-class-B-1024x1024.webp 1024w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/10\/water-meter-accuracy-class-B-150x150.webp 150w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/10\/water-meter-accuracy-class-B-768x768.webp 768w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/10\/water-meter-accuracy-class-B-12x12.webp 12w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/10\/water-meter-accuracy-class-B-600x600.webp 600w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/10\/water-meter-accuracy-class-B-100x100.webp 100w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/10\/water-meter-accuracy-class-B.webp 1200w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">BMAG Class B Water Meter Accuracy<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ddddc58 elementor-widget elementor-widget-heading\" data-id=\"ddddc58\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">3. Maximum Allowable Pressure (MAP)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9ad0a04 elementor-widget elementor-widget-text-editor\" data-id=\"9ad0a04\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Maximum Allowable Pressure (MAP) refers to the maximum static water pressure that a water meter can withstand under long-term normal operating conditions without compromising structural safety, sealing performance, or measurement accuracy. Common pressure ratings for Class B water meters currently available on the market include 1.0 MPa and 1.6 MPa.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4b65722 elementor-widget elementor-widget-heading\" data-id=\"4b65722\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">4. Pressure Loss<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c377c23 elementor-widget elementor-widget-text-editor\" data-id=\"c377c23\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The water meter itself creates resistance to water flow, resulting in pressure loss. The ISO 4064 standard defines different pressure loss classes, denoted as \u0394p. A lower pressure loss class indicates that the water meter has a smaller impact on water flow, which helps maintain water supply pressure at the end of the distribution network.<\/p><p>For Class B (Accuracy Class 2) water meters, within the flow range of Q1 to Q3, the maximum pressure loss typically does not exceed \u0394p63 (pressure loss class 63, equivalent to 0.063 MPa).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1f1165c elementor-widget elementor-widget-image\" data-id=\"1f1165c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"840\" height=\"328\" src=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/05\/class-B-water-meter-pressure-loss-curve.webp\" class=\"attachment-large size-large wp-image-8096\" alt=\"\" srcset=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/05\/class-B-water-meter-pressure-loss-curve.webp 840w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/05\/class-B-water-meter-pressure-loss-curve-300x117.webp 300w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/05\/class-B-water-meter-pressure-loss-curve-768x300.webp 768w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/05\/class-B-water-meter-pressure-loss-curve-18x7.webp 18w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/05\/class-B-water-meter-pressure-loss-curve-600x234.webp 600w\" sizes=\"(max-width: 840px) 100vw, 840px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">BMAG ISO 4064 Multi Jet Class B Water Meter Pressure Loss Curve<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e68eeb2 elementor-widget elementor-widget-heading\" data-id=\"e68eeb2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">5. Temperature Class<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ce0aac6 elementor-widget elementor-widget-text-editor\" data-id=\"ce0aac6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The temperature class for Class B water meters typically follows ISO classifications such as T30 (cold water) or T90 (hot water), depending on the meter design.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-b4f789a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b4f789a\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-7b8648e\" data-id=\"7b8648e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8021d26 elementor-widget elementor-widget-image\" data-id=\"8021d26\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/09\/Hot-Water-Meter-Single-Jet-Class-B-ISO4064-SJ-SDC-2-1024x1024.webp\" class=\"attachment-large size-large wp-image-7395\" alt=\"Contatore di acqua calda a getto singolo Classe B ISO4064 SJ-SDC\" srcset=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/09\/Hot-Water-Meter-Single-Jet-Class-B-ISO4064-SJ-SDC-2-1024x1024.webp 1024w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/09\/Hot-Water-Meter-Single-Jet-Class-B-ISO4064-SJ-SDC-2-300x300.webp 300w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/09\/Hot-Water-Meter-Single-Jet-Class-B-ISO4064-SJ-SDC-2-150x150.webp 150w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/09\/Hot-Water-Meter-Single-Jet-Class-B-ISO4064-SJ-SDC-2-768x768.webp 768w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/09\/Hot-Water-Meter-Single-Jet-Class-B-ISO4064-SJ-SDC-2-12x12.webp 12w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/09\/Hot-Water-Meter-Single-Jet-Class-B-ISO4064-SJ-SDC-2-600x600.webp 600w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/09\/Hot-Water-Meter-Single-Jet-Class-B-ISO4064-SJ-SDC-2-100x100.webp 100w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2025\/09\/Hot-Water-Meter-Single-Jet-Class-B-ISO4064-SJ-SDC-2.webp 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-3ce2d0a\" data-id=\"3ce2d0a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-337c523 elementor-widget elementor-widget-image\" data-id=\"337c523\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/BMAG-MJ-SDC-E-Plastic-multijet-water-meter-13-1024x1024.webp\" class=\"attachment-large size-large wp-image-2294\" alt=\"BMAG MJ-SDC-E Contatore acqua multigetto in plastica (13)\" srcset=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/BMAG-MJ-SDC-E-Plastic-multijet-water-meter-13-1024x1024.webp 1024w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/BMAG-MJ-SDC-E-Plastic-multijet-water-meter-13-300x300.webp 300w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/BMAG-MJ-SDC-E-Plastic-multijet-water-meter-13-150x150.webp 150w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/BMAG-MJ-SDC-E-Plastic-multijet-water-meter-13-768x768.webp 768w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/BMAG-MJ-SDC-E-Plastic-multijet-water-meter-13-600x600.webp 600w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/BMAG-MJ-SDC-E-Plastic-multijet-water-meter-13-100x100.webp 100w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/BMAG-MJ-SDC-E-Plastic-multijet-water-meter-13.webp 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-80567b1 elementor-widget elementor-widget-heading\" data-id=\"80567b1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">6. Size Range<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-35f7081 elementor-widget elementor-widget-text-editor\" data-id=\"35f7081\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The common size range for Class B water meters is typically DN15 (1\/2\u201c) to DN50 (2\u201d). This size range essentially covers the metering needs of most residential, small commercial, and light industrial water supply systems, making it the most widely used specification range for Class B mechanical water meters.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-269f050 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"269f050\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-f36185e\" data-id=\"f36185e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f23f977 elementor-widget elementor-widget-heading\" data-id=\"f23f977\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">How to Identify a Qualified Class B Water Meter?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fe158ac elementor-widget elementor-widget-text-editor\" data-id=\"fe158ac\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>By following the criteria below, we can effectively ensure compliance with Class B requirements.<\/p><ol><li>Require suppliers to provide certification marks compliant with ISO 4064 or GB\/T 778-2018. Additionally, check whether the product nameplate or test report clearly states \u201cISO 4064 Class B\u201d or \u201cAccuracy Class 2,\u201d along with relevant information such as the maximum allowable working pressure and pressure loss class.<\/li><li>It is essential to require suppliers to provide type test reports or type approval certificates issued by an authoritative third-party laboratory, as these reports serve as core evidence demonstrating that the water meters meet accuracy and durability requirements.<\/li><li>Selecting a reliable manufacturer is key to ensuring water meter quality. Priority should be given to suppliers that meet the following criteria:<\/li><\/ol><ul><li>Hold ISO 9001 quality management system certification, OIML R49 certification, and an ISO 4064 Class B type approval certificate<\/li><li>Possess many years of manufacturing experience, be familiar with ISO 4064 and GB\/T 778 standards, and provide complete technical documentation and test reports<\/li><li>Allow factory audits, including production line and quality control inspections<\/li><li>Be able to provide spare parts, technical support, and periodic verification services<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-e109265 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"e109265\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-e22c259\" data-id=\"e22c259\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-35ac61f elementor-widget elementor-widget-heading\" data-id=\"35ac61f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">FAQ<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e27db4c elementor-widget elementor-widget-heading\" data-id=\"e27db4c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Is Class B same as Accuracy Class 2?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-da66f7a elementor-widget elementor-widget-text-editor\" data-id=\"da66f7a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>No, Class B is not exactly the same as Accuracy Class 2 because the two do not adopt the same standard, Accuracy Class 2 utilizes the ISO 4064:2014 standard, whereas Class B utilizes the ISO 4064:1993 standard. However, Class 2 meters correspond to the legacy Class A and Class B meters, and Class B is most commonly associated with Accuracy Class 2 in practice.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-784524f elementor-widget elementor-widget-heading\" data-id=\"784524f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Is Class B Still Relevant under Current Standards?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-585ffed elementor-widget elementor-widget-text-editor\" data-id=\"585ffed\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Formally, no. ISO 4064:2014 replaced Class A\/B\/C\/D with Accuracy Class 1 and Class 2. However, \u201cClass B\u201d is still widely used in the market as an informal reference, typically corresponding to Accuracy Class 2.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-901144c elementor-widget elementor-widget-heading\" data-id=\"901144c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What Applications are Suitable for Class B Water Meters?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a326b71 elementor-widget elementor-widget-text-editor\" data-id=\"a326b71\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Residential water supply systems<br \/>Apartment sub-metering<br \/>Small commercial buildings<br \/>General water distribution networks with stable flow conditions<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a3bc439 elementor-widget elementor-widget-heading\" data-id=\"a3bc439\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">How Accurate is a Class B Water Meter?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-614e9bc elementor-widget elementor-widget-text-editor\" data-id=\"614e9bc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>According to ISO 4064-based performance:<br \/>Lower zone Q1\u2264Q&lt;Q2: \u00b15%<br \/>Upper zone Q2\u2264Q\u2264Q4:<br \/>\u00b12% for \u226430\u00b0C<br \/>\u00b13% for &gt;30\u00b0C<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-739a0fb elementor-widget elementor-widget-heading\" data-id=\"739a0fb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Are Class B Water Meters Suitable for Low-flow Detection?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2d59832 elementor-widget elementor-widget-text-editor\" data-id=\"2d59832\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>They provide moderate low-flow sensitivity but are not ideal for detecting very small leakage flows. For higher sensitivity, Class C (R160) meters are recommended.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Class B water meter\u00a0remains one of the most widely used mechanical water meter types for residential and light commercial water metering due to its balanced combination of accuracy, cost-effectiveness, and long-term operational reliability. What is a Class B Water Meter? A Class B water meter is an older accuracy class used in older international standards [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8103,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[120,127],"tags":[],"class_list":["post-8093","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-residential-water-meter"],"_links":{"self":[{"href":"https:\/\/www.bmagmeter.com\/it\/wp-json\/wp\/v2\/posts\/8093","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bmagmeter.com\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bmagmeter.com\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bmagmeter.com\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bmagmeter.com\/it\/wp-json\/wp\/v2\/comments?post=8093"}],"version-history":[{"count":7,"href":"https:\/\/www.bmagmeter.com\/it\/wp-json\/wp\/v2\/posts\/8093\/revisions"}],"predecessor-version":[{"id":8102,"href":"https:\/\/www.bmagmeter.com\/it\/wp-json\/wp\/v2\/posts\/8093\/revisions\/8102"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bmagmeter.com\/it\/wp-json\/wp\/v2\/media\/8103"}],"wp:attachment":[{"href":"https:\/\/www.bmagmeter.com\/it\/wp-json\/wp\/v2\/media?parent=8093"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bmagmeter.com\/it\/wp-json\/wp\/v2\/categories?post=8093"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bmagmeter.com\/it\/wp-json\/wp\/v2\/tags?post=8093"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}