{"id":8304,"date":"2026-07-14T11:09:43","date_gmt":"2026-07-14T03:09:43","guid":{"rendered":"https:\/\/www.bmagmeter.com\/?p=8304"},"modified":"2026-07-14T11:13:21","modified_gmt":"2026-07-14T03:13:21","slug":"water-meter-pressure-loss","status":"publish","type":"post","link":"https:\/\/www.bmagmeter.com\/fr\/water-meter-pressure-loss\/","title":{"rendered":"Water Meter Pressure Loss"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"8304\" class=\"elementor elementor-8304\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-b01018e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b01018e\" 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-d1e7f59\" data-id=\"d1e7f59\" 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-5bb0aa3 elementor-widget elementor-widget-text-editor\" data-id=\"5bb0aa3\" 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 href=\"https:\/\/www.bmagmeter.com\/fr\/\"><u>Water meter<\/u><\/a>\u00a0pressure loss is the pressure drop caused by energy loss as water flows through a water meter, and one of the key indicators used to evaluate its hydraulic performance. In any fluid distribution system, energy loss is an inevitable physical phenomenon. Since the water meter itself acts as a localized flow resistance within the pipeline, a certain amount of energy is lost as water flows through its internal passages and metering mechanism. This ultimately manifests as a pressure difference between the meter\u2019s inlet and outlet\u2014known as water meter pressure loss.<\/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-2be75f0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2be75f0\" 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-eef8f07\" data-id=\"eef8f07\" 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-3b35812 elementor-widget elementor-widget-heading\" data-id=\"3b35812\" 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\">Why Do We Need To Understand Water Meter Pressure Loss?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1ceb5ca elementor-widget elementor-widget-text-editor\" data-id=\"1ceb5ca\" 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>Water meter pressure loss is not merely a physical value representing a pressure difference; excessive pressure loss means that water flow must overcome greater resistance as it passes through the meter, which can lead to a series of related problems in practical applications. For example:<\/p><ul><li>Water meters with high internal resistance (which also cause higher pressure loss) typically have a higher starting flow rate, so they may fail to register very low flows such as minor drips, leading to under-reading and inaccurate billing.<\/li><li>During peak water usage periods when water pressure is insufficient, we may experience fluctuating water flow or sudden changes in water temperature while showering, which affects the overall water usage experience.<\/li><li>A high pressure differential (\u0394P) forces booster pumps to work harder, consuming more electricity to maintain stable water pressure. This not only generates noise but also increases electricity costs.<\/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-b9c479e elementor-widget elementor-widget-image\" data-id=\"b9c479e\" 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=\"600\" height=\"399\" src=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/07\/Why-Do-We-Need-To-Understand-Water-Meter-Pressure-Loss.webp\" class=\"attachment-large size-large wp-image-8307\" alt=\"Why Do We Need To Understand Water Meter Pressure Loss\" srcset=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/07\/Why-Do-We-Need-To-Understand-Water-Meter-Pressure-Loss.webp 600w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/07\/Why-Do-We-Need-To-Understand-Water-Meter-Pressure-Loss-300x200.webp 300w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/07\/Why-Do-We-Need-To-Understand-Water-Meter-Pressure-Loss-18x12.webp 18w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\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-d3c7ed8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d3c7ed8\" 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-00c1fa2\" data-id=\"00c1fa2\" 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-575aadf elementor-widget elementor-widget-heading\" data-id=\"575aadf\" 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 Pressure Loss (\u0394p)?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-189579a elementor-widget elementor-widget-text-editor\" data-id=\"189579a\" 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>Pressure loss in a water meter refers to the pressure loss (\u0394p) between the meter\u2019s inlet and outlet. Common units include:<\/p><ul><li><strong>Megapascals (MPa):<\/strong>The standard unit of pressure in the International System of Units (SI). 1 MPa = 1,000,000 Pa.<\/li><li><strong>Kilopascals (kPa):<\/strong>Also an SI unit, extremely common in water meter standards. 1 kPa = 1,000 Pa; 1 MPa = 1,000 kPa.<\/li><li><strong>Bar (bar):<\/strong>A unit very close to atmospheric pressure, widely used in industrial applications. 1 bar = 0.1 MPa = 100 kPa.<\/li><li><strong>Pounds per square inch (PSI):<\/strong>Commonly used in North America (especially in regions that follow AWWA standards). 1 PSI \u2248 0.006895 MPa \u2248 6.895 kPa.<\/li><\/ul><p>According to relevant standards from the International Organization for Standardization (ISO) and the International Organization of Legal Metrology (OIML), such as ISO 4064, the maximum allowable pressure loss at the nominal flow rate (Q3) should typically not exceed 0.063 MPa.\u00a0This value\u201463 kPa\u2014is often abbreviated in the industry as \u201c\u0394p63\u201d and serves as a benchmark for measuring the hydraulic performance of water meters.<\/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-3ee13c4 elementor-widget elementor-widget-image\" data-id=\"3ee13c4\" 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=\"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=\"class B water meter pressure loss curve\" 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\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-7204571 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7204571\" 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-e820140\" data-id=\"e820140\" 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-0826a28 elementor-widget elementor-widget-heading\" data-id=\"0826a28\" 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\">Relationship Between Pressure Loss and the Square of Flow Rate<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b4801f1 elementor-widget elementor-widget-text-editor\" data-id=\"b4801f1\" 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>Understanding the relationship between pressure loss and flow rate (or flow velocity) helps us better comprehend pressure loss.<\/p><p>For a water meter of a specific design, its pressure loss is not a constant value but increases sharply as the flow rate increases. This relationship can be described by the following classic fluid dynamics formula:<\/p><p><strong>\u0394p = k \u00d7 Q\u00b2<\/strong><\/p><p><strong>Where:<\/strong><\/p><ul><li>\u0394p is the pressure loss<\/li><li>Q is the volumetric flow rate through the water meter (e.g., m\u00b3\/h)<\/li><li>k is a resistance coefficient (or flow coefficient), which is a comprehensive constant dependent on intrinsic factors such as the water meter\u2019s nominal diameter, internal structural design, and manufacturing process. A water meter with excellent hydraulic design and smooth internal flow paths has a small k-value; conversely, a water meter with a complex internal structure and numerous obstructions has a large k-value.<\/li><\/ul><p>This quadratic relationship means that the rate of increase in pressure loss far exceeds the rate of increase in flow rate.<\/p><p><strong>Let\u2019s illustrate its importance with a simple example:<\/strong><\/p><p>Suppose that at a flow rate of Q\u2081, the pressure loss of a water meter is \u0394p\u2081. According to the formula, when the flow rate doubles to 2 \u00d7 Q\u2081, the new pressure loss \u0394p\u2082 becomes:<\/p><p>\u0394p\u2082 = k \u00d7 (2 \u00d7 Q\u2081)\u00b2 = k \u00d7 4 \u00d7 Q\u2081\u00b2 = 4 \u00d7 (k \u00d7 Q\u2081\u00b2) = 4 \u00d7 \u0394p\u2081<\/p><p>The conclusion is that when the flow rate doubles, the pressure loss increases to four times its original value.<\/p><p><strong>In other words:<\/strong><\/p><ul><li>Under low-flow conditions (such as minor leaks at night), the pressure loss of a water meter is negligible and can be virtually ignored.<\/li><li>However, during peak water usage periods, when the flow rate approaches or reaches its normal flow rate (Q3) or even the overload flow rate (Q4), the impact of the water meter\u2019s pressure loss is magnified, becoming a significant component of the total pressure loss in the entire customer-side water supply system.<\/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-bb2e5f5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"bb2e5f5\" 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-87fccab\" data-id=\"87fccab\" 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-fdb3058 elementor-widget elementor-widget-heading\" data-id=\"fdb3058\" 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\">Causes &amp; Influencing Factors of Pressure Loss<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6789717 elementor-widget elementor-widget-heading\" data-id=\"6789717\" 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\">Pressure Loss Causes<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-efd0a80 elementor-widget elementor-widget-text-editor\" data-id=\"efd0a80\" 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 mechanism of pressure loss inside a water meter primarily stems from energy loss due to frictional resistance as water flows past the walls of the internal flow passages, or from energy loss caused by sudden changes in water velocity and direction\u2014resulting in vortices and turbulence\u2014induced by internal components (such as the inlet strainer, flow guide, impeller, and measuring chamber).<\/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-65739bc elementor-widget elementor-widget-heading\" data-id=\"65739bc\" 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\">Influencing Factors<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0423906 elementor-widget elementor-widget-text-editor\" data-id=\"0423906\" 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>Based on the mechanism of pressure loss, any factor that affects flow resistance or changes in flow patterns will influence the meter\u2019s pressure loss performance.<\/p><p>Generally speaking, these factors can be divided into two major categories: the water meter\u2019s own design and external operating conditions.<\/p><p><strong>Internal structural factors of water meters including:<\/strong><\/p><ul><li>Metering principle<\/li><li>Flow channel design<\/li><li>Strainer structure<\/li><li>Scaling, impurity deposition and component aging during service<\/li><\/ul><p>Among these, the metering principle has the most significant impact.<\/p><ul><li>Mechanical water meters rely on moving parts such as impellers and turbines to measure flow, with pressure losses typically around \u0394p63.<\/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-a63bf30 elementor-widget elementor-widget-image\" data-id=\"a63bf30\" 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=\"300\" height=\"300\" src=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/TG-BRASS-MULTI-JET-WATER-METER-with-360\u00b0-roating-R160-IP68-with-copper-register-cup-DN15-190mm-4_-300x300.webp\" class=\"attachment-medium size-medium wp-image-4324\" alt=\"COMPTEUR D&#039;EAU MULTI JET BMAG TG LAITON avec rotation 360\u00b0 R160 IP68 avec coupelle de registre en cuivre DN15 190mm (4)\" srcset=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/TG-BRASS-MULTI-JET-WATER-METER-with-360\u00b0-roating-R160-IP68-with-copper-register-cup-DN15-190mm-4_-300x300.webp 300w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/TG-BRASS-MULTI-JET-WATER-METER-with-360\u00b0-roating-R160-IP68-with-copper-register-cup-DN15-190mm-4_-1024x1024.webp 1024w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/TG-BRASS-MULTI-JET-WATER-METER-with-360\u00b0-roating-R160-IP68-with-copper-register-cup-DN15-190mm-4_-150x150.webp 150w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/TG-BRASS-MULTI-JET-WATER-METER-with-360\u00b0-roating-R160-IP68-with-copper-register-cup-DN15-190mm-4_-768x768.webp 768w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/TG-BRASS-MULTI-JET-WATER-METER-with-360\u00b0-roating-R160-IP68-with-copper-register-cup-DN15-190mm-4_-12x12.webp 12w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/TG-BRASS-MULTI-JET-WATER-METER-with-360\u00b0-roating-R160-IP68-with-copper-register-cup-DN15-190mm-4_-600x600.webp 600w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/TG-BRASS-MULTI-JET-WATER-METER-with-360\u00b0-roating-R160-IP68-with-copper-register-cup-DN15-190mm-4_-100x100.webp 100w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/TG-BRASS-MULTI-JET-WATER-METER-with-360\u00b0-roating-R160-IP68-with-copper-register-cup-DN15-190mm-4_.webp 1200w\" 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-03a84f6 elementor-widget elementor-widget-text-editor\" data-id=\"03a84f6\" 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<ul><li>Ultrasonic water meters, on the other hand, feature a design with no moving parts and smoother internal flow channels, allowing pressure losses to be as low as \u0394p16 or even \u0394p10.<\/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-e2f3260 elementor-widget elementor-widget-image\" data-id=\"e2f3260\" 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=\"300\" src=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/02\/ULW-100-Ultrasonic-Bulk-Water-Meter-1-300x300.webp\" class=\"attachment-medium size-medium wp-image-7681\" alt=\"ULW-100 Ultrasonic Bulk Water Meter 1\" srcset=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/02\/ULW-100-Ultrasonic-Bulk-Water-Meter-1-300x300.webp 300w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/02\/ULW-100-Ultrasonic-Bulk-Water-Meter-1-1024x1024.webp 1024w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/02\/ULW-100-Ultrasonic-Bulk-Water-Meter-1-150x150.webp 150w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/02\/ULW-100-Ultrasonic-Bulk-Water-Meter-1-768x768.webp 768w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/02\/ULW-100-Ultrasonic-Bulk-Water-Meter-1-12x12.webp 12w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/02\/ULW-100-Ultrasonic-Bulk-Water-Meter-1-600x600.webp 600w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/02\/ULW-100-Ultrasonic-Bulk-Water-Meter-1-100x100.webp 100w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/02\/ULW-100-Ultrasonic-Bulk-Water-Meter-1.webp 1200w\" 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-4563a63 elementor-widget elementor-widget-text-editor\" data-id=\"4563a63\" 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><strong>External factors primarily including:<\/strong><\/p><ul><li>Water meter\u2019s nominal diameter<\/li><li>Water quality conditions (such as silt, suspended particles, and scale deposits)<\/li><li>Installation conditions<\/li><\/ul><p>The larger the nominal diameter, the lower the flow velocity, and the smaller the pressure loss tends to be; conversely, blockages caused by impurities, scaling, or insufficient straight pipe runs can all increase flow resistance, leading to higher pressure loss.<\/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-4587330 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4587330\" 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-0af0b00\" data-id=\"0af0b00\" 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-3e1e192 elementor-widget elementor-widget-heading\" data-id=\"3e1e192\" 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\">Pressure Loss Classes<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7b7dff4 elementor-widget elementor-widget-text-editor\" data-id=\"7b7dff4\" 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 ISO 4064 and OIML R 49 standards specify the maximum allowable pressure loss values for water meters across their entire operating flow range.<\/p><p>Common classes include:<\/p><p><strong>\u0394p63:<\/strong>\u00a0Maximum pressure loss of 63 kPa, or 0.063 MPa (or 0.63 bar).<\/p><p><strong>\u0394p40:<\/strong>\u00a0Maximum pressure loss of 40 kPa, or 0.040 MPa (or 0.40 bar).<\/p><p><strong>\u0394p25:<\/strong>\u00a0Maximum pressure loss of 25 kPa, or 0.025 MPa (or 0.25 bar).<\/p><p><strong>\u0394p16:<\/strong>\u00a0The maximum pressure loss is 16 kPa, or 0.016 MPa (or 0.16 bar).<\/p><p><strong>\u0394p10:<\/strong>\u00a0The maximum pressure loss is 10 kPa, or 0.010 MPa (or 0.10 bar).<\/p><p>The lower the rating value, the better the water meter\u2019s pressure loss performance. \u0394p63 (0.063 MPa) is a common upper limit, but this may vary by region (for example, AWWA requirements are stricter, stipulating that maximum pressure loss must not exceed 7 PSI (approximately 0.48 bar) or 4 PSI (approximately 0.27 bar)).<\/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-9183752 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"9183752\" 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-8a29c01\" data-id=\"8a29c01\" 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-97aa9d3 elementor-widget elementor-widget-heading\" data-id=\"97aa9d3\" 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-95d0c67 elementor-widget elementor-widget-heading\" data-id=\"95d0c67\" 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\">Which pressure loss rating should be selected for a 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-1ef0e9a elementor-widget elementor-widget-text-editor\" data-id=\"1ef0e9a\" 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>Different applications have different pressure loss requirements.<\/p><ul><li><strong>For standard residential or general commercial installations<\/strong>, a \u0394p63-rated mechanical or ultrasonic water meter is sufficient to meet daily water supply needs.<\/li><\/ul><p><strong>Product Recommendations:<\/strong><\/p><p><a href=\"https:\/\/www.bmagmeter.com\/fr\/produit\/compteur-deau-sec-de-type-laiton-avec-materiau-non-toxique-et-non-dangereux\/\">\u0394P63 Mechanical Water Meter<\/a><\/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-fcee2ed elementor-widget elementor-widget-image\" data-id=\"fcee2ed\" 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\t<a href=\"https:\/\/www.bmagmeter.com\/fr\/produit\/compteur-deau-sec-de-type-laiton-avec-materiau-non-toxique-et-non-dangereux\/\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"253\" height=\"300\" src=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/TG-Brass-Multi-Jet-Water-Meter-IP68-1-253x300.png\" class=\"attachment-medium size-medium wp-image-1355\" alt=\"TG-Brass-Multi-Jet-Water-Meter-IP68\" srcset=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/TG-Brass-Multi-Jet-Water-Meter-IP68-1-253x300.png 253w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/TG-Brass-Multi-Jet-Water-Meter-IP68-1-768x912.png 768w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/TG-Brass-Multi-Jet-Water-Meter-IP68-1-600x713.png 600w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/06\/TG-Brass-Multi-Jet-Water-Meter-IP68-1.png 800w\" sizes=\"(max-width: 253px) 100vw, 253px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\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-b51a54d elementor-widget elementor-widget-text-editor\" data-id=\"b51a54d\" 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<ul><li><strong>For large-scale commercial or industrial applications<\/strong>requiring precise control of downstream pressure, or situations involving long pipeline runs, it is necessary to use \u0394p25 water meters with lower pressure loss, or even \u0394p10 ultrasonic water meters with ultra-low pressure loss.<\/li><\/ul><p><strong>Product Recommendations:<\/strong><\/p><p><a href=\"https:\/\/www.bmagmeter.com\/fr\/produit\/compteur-deau-domestique-a-ultrasons-bmag-7\/\">\u0394p10 Ultrasonic Water Meter<\/a><\/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-e6375e7 elementor-widget elementor-widget-image\" data-id=\"e6375e7\" 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\t<a href=\"https:\/\/www.bmagmeter.com\/fr\/produit\/compteur-deau-domestique-a-ultrasons-bmag-7\/\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/02\/ULW-100-Ultrasonic-Bulk-Water-Meter-300x300.webp\" class=\"attachment-medium size-medium wp-image-7680\" alt=\"ULW-100 Compteur d&#039;eau en vrac \u00e0 ultrasons\" srcset=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/02\/ULW-100-Ultrasonic-Bulk-Water-Meter-300x300.webp 300w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/02\/ULW-100-Ultrasonic-Bulk-Water-Meter-1024x1024.webp 1024w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/02\/ULW-100-Ultrasonic-Bulk-Water-Meter-150x150.webp 150w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/02\/ULW-100-Ultrasonic-Bulk-Water-Meter-768x768.webp 768w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/02\/ULW-100-Ultrasonic-Bulk-Water-Meter-12x12.webp 12w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/02\/ULW-100-Ultrasonic-Bulk-Water-Meter-600x600.webp 600w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/02\/ULW-100-Ultrasonic-Bulk-Water-Meter-100x100.webp 100w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2026\/02\/ULW-100-Ultrasonic-Bulk-Water-Meter.webp 1200w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\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-6b54f47 elementor-widget elementor-widget-heading\" data-id=\"6b54f47\" 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 is pressure loss tested?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8005060 elementor-widget elementor-widget-text-editor\" data-id=\"8005060\" 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>Pressure loss testing is typically conducted on a specially designed hydraulic test bench. Pressure sensors are installed at the water meter\u2019s inlet and outlet to measure the pressure difference between the two ends at different flow rates. A pressure loss curve is then plotted to determine whether the meter meets the \u0394p63, \u0394p25, or \u0394p16 requirements specified in standards such as ISO 4064.<\/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-08a78f3 elementor-widget elementor-widget-text-editor\" data-id=\"08a78f3\" 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><strong>Test Benches:<\/strong><\/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-9cf975a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"9cf975a\" 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-c481c56\" data-id=\"c481c56\" 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-738d8ee elementor-widget elementor-widget-image\" data-id=\"738d8ee\" 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\/fr\/produit\/banc-dessai-pour-compteur-deau-automatique\/\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/08\/BMAG-automatic-water-meter-test-bench-with-mechanical-arm-1024x768.webp\" class=\"attachment-large size-large wp-image-4451\" alt=\"BMAG Automatic Water Meter Test Bench With Mechanical Arm\" srcset=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/08\/BMAG-automatic-water-meter-test-bench-with-mechanical-arm-1024x768.webp 1024w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/08\/BMAG-automatic-water-meter-test-bench-with-mechanical-arm-300x225.webp 300w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/08\/BMAG-automatic-water-meter-test-bench-with-mechanical-arm-768x576.webp 768w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/08\/BMAG-automatic-water-meter-test-bench-with-mechanical-arm-16x12.webp 16w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/08\/BMAG-automatic-water-meter-test-bench-with-mechanical-arm-600x450.webp 600w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/08\/BMAG-automatic-water-meter-test-bench-with-mechanical-arm.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\">BMAG Automatic Water Meter Test Bench With Mechanical Arm<\/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-50 elementor-inner-column elementor-element elementor-element-c8b0174\" data-id=\"c8b0174\" 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-9189851 elementor-widget elementor-widget-image\" data-id=\"9189851\" 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\/fr\/produit\/banc-dessai-pour-compteur-deau-a-ultrasons\/\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"962\" src=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/08\/BMAG-Ultrasonic-Water-Meter-Test-Bench-2-1024x962.webp\" class=\"attachment-large size-large wp-image-4441\" alt=\"Banc d&#039;essai de compteur d&#039;eau \u00e0 ultrasons BMAG 2\" srcset=\"https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/08\/BMAG-Ultrasonic-Water-Meter-Test-Bench-2-1024x962.webp 1024w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/08\/BMAG-Ultrasonic-Water-Meter-Test-Bench-2-300x282.webp 300w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/08\/BMAG-Ultrasonic-Water-Meter-Test-Bench-2-768x722.webp 768w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/08\/BMAG-Ultrasonic-Water-Meter-Test-Bench-2-13x12.webp 13w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/08\/BMAG-Ultrasonic-Water-Meter-Test-Bench-2-600x564.webp 600w, https:\/\/www.bmagmeter.com\/wp-content\/uploads\/2024\/08\/BMAG-Ultrasonic-Water-Meter-Test-Bench-2.webp 1064w\" 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\">BMAG Ultrasonic Water Meter Test Bench<\/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-1ebf9fc elementor-widget elementor-widget-heading\" data-id=\"1ebf9fc\" 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\">Does lower pressure loss mean more accurate measurement?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-951d086 elementor-widget elementor-widget-text-editor\" data-id=\"951d086\" 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>Not necessarily.<\/p><p>Pressure loss reflects the water meter\u2019s resistance to water flow, while measurement accuracy depends on the metering principle, sensor performance, and calibration level\u2014these are two distinct performance metrics. An ideal water meter should combine both low pressure loss and high measurement accuracy.<\/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-cf1f80a elementor-widget elementor-widget-heading\" data-id=\"cf1f80a\" 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\">If the water pressure seems to decrease after using a water meter for several years, is it a problem with the 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-5b7dae3 elementor-widget elementor-widget-text-editor\" data-id=\"5b7dae3\" 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>It\u2019s possible. After prolonged use, a clogged filter screen, scale buildup, or wear on mechanical parts can all increase the water meter\u2019s pressure loss, resulting in reduced water flow. If you\u2019ve ruled out issues with the municipal water supply or plumbing, we recommend checking the condition of the water meter and cleaning or replacing it if necessary.<\/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>Water meter\u00a0pressure loss is the pressure drop caused by energy loss as water flows through a water meter, and one of the key indicators used to evaluate its hydraulic performance. In any fluid distribution system, energy loss is an inevitable physical phenomenon. Since the water meter itself acts as a localized flow resistance within the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8096,"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],"tags":[],"class_list":["post-8304","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/www.bmagmeter.com\/fr\/wp-json\/wp\/v2\/posts\/8304","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bmagmeter.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bmagmeter.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bmagmeter.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bmagmeter.com\/fr\/wp-json\/wp\/v2\/comments?post=8304"}],"version-history":[{"count":4,"href":"https:\/\/www.bmagmeter.com\/fr\/wp-json\/wp\/v2\/posts\/8304\/revisions"}],"predecessor-version":[{"id":8310,"href":"https:\/\/www.bmagmeter.com\/fr\/wp-json\/wp\/v2\/posts\/8304\/revisions\/8310"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bmagmeter.com\/fr\/wp-json\/wp\/v2\/media\/8096"}],"wp:attachment":[{"href":"https:\/\/www.bmagmeter.com\/fr\/wp-json\/wp\/v2\/media?parent=8304"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bmagmeter.com\/fr\/wp-json\/wp\/v2\/categories?post=8304"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bmagmeter.com\/fr\/wp-json\/wp\/v2\/tags?post=8304"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}