{"id":4453,"date":"2026-08-25T08:30:17","date_gmt":"2026-08-25T12:30:17","guid":{"rendered":"https:\/\/backflow-shop.com\/?p=4453"},"modified":"2026-08-25T10:44:02","modified_gmt":"2026-08-25T14:44:02","slug":"the-impact-of-backflow-prevention-devices-on-water-pressure","status":"publish","type":"post","link":"https:\/\/backflow-shop.com\/en\/the-impact-of-backflow-prevention-devices-on-water-pressure\/","title":{"rendered":"The impact of Backflow Prevention Devices on water pressure"},"content":{"rendered":"<h4><strong><span class=\"NormalTextRun SCXW62904685 BCX0\">How does a\u00a0<\/span><span class=\"NormalTextRun SCXW62904685 BCX0\">B<\/span><span class=\"NormalTextRun SCXW62904685 BCX0\">ackflow\u00a0<\/span><span class=\"NormalTextRun SCXW62904685 BCX0\">P<\/span><span class=\"NormalTextRun SCXW62904685 BCX0\">revention\u00a0<\/span><span class=\"NormalTextRun SCXW62904685 BCX0\">D<\/span><span class=\"NormalTextRun SCXW62904685 BCX0\">evice (<\/span><span class=\"NormalTextRun SCXW62904685 BCX0\">BPD<\/span><span class=\"NormalTextRun SCXW62904685 BCX0\">) work?<\/span><\/strong><\/h4>\n<p><span class=\"NormalTextRun SCXW76168718 BCX0\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-medium wp-image-4434 alignleft\" src=\"https:\/\/backflow-shop.com\/wp-content\/uploads\/2026\/08\/DARSPEC_photoshoot_107-200x300.jpg\" alt=\"\" width=\"200\" height=\"300\" srcset=\"https:\/\/backflow-shop.com\/wp-content\/uploads\/2026\/08\/DARSPEC_photoshoot_107-200x300.jpg 200w, https:\/\/backflow-shop.com\/wp-content\/uploads\/2026\/08\/DARSPEC_photoshoot_107-600x900.jpg 600w, https:\/\/backflow-shop.com\/wp-content\/uploads\/2026\/08\/DARSPEC_photoshoot_107.jpg 667w\" sizes=\"(max-width: 200px) 100vw, 200px\" \/><span class=\"NormalTextRun SCXW136647853 BCX0\">Reduced Pressure\u00a0<\/span><span class=\"NormalTextRun ContextualSpellingAndGrammarErrorV2Themed SCXW136647853 BCX0\">Principle<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">\u00a0<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">Backflow Preventer<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">\u00a0Assembly\u00a0<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">(<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">RP)<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">\u00a0and D<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">ouble<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">\u00a0Check Valve<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">\u00a0Backflow Preventer Assembly<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">\u00a0(<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">DCVA<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">) are designed to prevent water from\u00a0<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">coming back<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">\u00a0in the wrong direction and thus protect the drinking water\u00a0<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">network<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">\u00a0from backflow. They use valves held closed by springs.\u00a0<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">F<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">or water to pass through the device, the\u00a0<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">network\u00a0<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">pressure must first\u00a0<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">exceed<\/span><span class=\"NormalTextRun SCXW136647853 BCX0\">\u00a0the resistance created by these springs.<\/span><br \/>\n<\/span><\/p>\n<p><span class=\"TextRun SCXW88299366 BCX0\" lang=\"EN-CA\" xml:lang=\"EN-CA\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW88299366 BCX0\">If back pressure or siphoning occurs, the valves close automatically to prevent contamination of the drinking water supply.<\/span><\/span><\/p>\n<h4><\/h4>\n<h4><\/h4>\n<h4><\/h4>\n<h4><\/h4>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h4><\/h4>\n<h4><strong><span class=\"NormalTextRun SCXW162174358 BCX0\">Why does a<\/span><span class=\"NormalTextRun SCXW162174358 BCX0\">\u00a0BPD cause a\u00a0<\/span><span class=\"NormalTextRun SCXW162174358 BCX0\">pressure<\/span><span class=\"NormalTextRun SCXW162174358 BCX0\">\u00a0drop<\/span><span class=\"NormalTextRun SCXW162174358 BCX0\">?<\/span><\/strong><\/h4>\n<h4><strong><span class=\"NormalTextRun SCXW146688855 BCX0\"><img decoding=\"async\" class=\"size-medium wp-image-4438 alignright\" src=\"https:\/\/backflow-shop.com\/wp-content\/uploads\/2026\/08\/DARSPEC_photoshoot_122-200x300.jpg\" alt=\"\" width=\"200\" height=\"300\" srcset=\"https:\/\/backflow-shop.com\/wp-content\/uploads\/2026\/08\/DARSPEC_photoshoot_122-200x300.jpg 200w, https:\/\/backflow-shop.com\/wp-content\/uploads\/2026\/08\/DARSPEC_photoshoot_122-600x900.jpg 600w, https:\/\/backflow-shop.com\/wp-content\/uploads\/2026\/08\/DARSPEC_photoshoot_122.jpg 667w\" sizes=\"(max-width: 200px) 100vw, 200px\" \/><\/span><\/strong><\/h4>\n<p><span data-contrast=\"auto\">Since the water\u00a0must\u00a0pass through the spring-loaded check\u00a0valves, some pressure loss is inevitable. This loss is part of the\u00a0device\u2019s\u00a0normal operation and is the price to pay to ensure network\u00a0protection.<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">Typically\u00a0observed\u00a0pressure losses are:<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p>\n<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"5\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"auto\">RP:\u00a0approximately\u00a08 to 12 psi*<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/li>\n<\/ul>\n<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"5\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}\" data-aria-posinset=\"2\" data-aria-level=\"1\"><span data-contrast=\"auto\">DCVA:\u00a0approximately\u00a03 to 8 psi*<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/li>\n<\/ul>\n<p><span data-contrast=\"auto\">*The\u00a0higher\u00a0the water flow\u00a0rate, the\u00a0greater\u00a0this loss. This is caused by increased friction,\u00a0pressure\u00a0drop, and\u00a0water\u00a0turbulence\u00a0within\u00a0the device.<\/span><\/p>\n<h4><strong><span class=\"TextRun SCXW122125477 BCX0\" lang=\"EN-CA\" xml:lang=\"EN-CA\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW122125477 BCX0\">What happens when a\u00a0<\/span><span class=\"NormalTextRun SCXW122125477 BCX0\">BPD\u00a0<\/span><span class=\"NormalTextRun SCXW122125477 BCX0\">deteriorates<\/span><span class=\"NormalTextRun SCXW122125477 BCX0\">?<\/span><\/span><\/strong><span class=\"EOP Selected SCXW122125477 BCX0\" data-ccp-props=\"{}\">\u00a0<\/span><\/h4>\n<p><span class=\"TextRun SCXW162610757 BCX0\" lang=\"EN-CA\" xml:lang=\"EN-CA\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW162610757 BCX0\">A<\/span><span class=\"NormalTextRun SCXW162610757 BCX0\">nnual\u00a0<\/span><span class=\"NormalTextRun SCXW162610757 BCX0\">inspection<\/span><span class=\"NormalTextRun SCXW162610757 BCX0\">\u00a0confirms that the valves,\u00a0<\/span><span class=\"NormalTextRun SCXW162610757 BCX0\">springs<\/span><span class=\"NormalTextRun SCXW162610757 BCX0\">\u00a0and sealing components are\u00a0<\/span><span class=\"NormalTextRun SCXW162610757 BCX0\">functioning<\/span><span class=\"NormalTextRun SCXW162610757 BCX0\">\u00a0accord<\/span><span class=\"NormalTextRun SCXW162610757 BCX0\">ing<\/span><span class=\"NormalTextRun SCXW162610757 BCX0\">\u00a0<\/span><span class=\"NormalTextRun SCXW162610757 BCX0\">to<\/span><span class=\"NormalTextRun SCXW162610757 BCX0\">\u00a0the manufacturer&#8217;s specifications and thus\u00a0<\/span><span class=\"NormalTextRun SCXW162610757 BCX0\">comply with<\/span><span class=\"NormalTextRun SCXW162610757 BCX0\">\u00a0CSA B64.10 standard.<\/span><\/span><span class=\"EOP Selected SCXW162610757 BCX0\" data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p>\n<p><span class=\"NormalTextRun SCXW114282625 BCX0\"><img decoding=\"async\" class=\"size-medium wp-image-4436 alignleft\" src=\"https:\/\/backflow-shop.com\/wp-content\/uploads\/2026\/08\/immeuble-Darspec-300x251.jpg\" alt=\"\" width=\"300\" height=\"251\" srcset=\"https:\/\/backflow-shop.com\/wp-content\/uploads\/2026\/08\/immeuble-Darspec-300x251.jpg 300w, https:\/\/backflow-shop.com\/wp-content\/uploads\/2026\/08\/immeuble-Darspec-768x644.jpg 768w, https:\/\/backflow-shop.com\/wp-content\/uploads\/2026\/08\/immeuble-Darspec-600x503.jpg 600w, https:\/\/backflow-shop.com\/wp-content\/uploads\/2026\/08\/immeuble-Darspec.jpg 940w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><span class=\"NormalTextRun SCXW219596561 BCX0\">Like a<\/span><span class=\"NormalTextRun SCXW219596561 BCX0\">ll<\/span><span class=\"NormalTextRun SCXW219596561 BCX0\">\u00a0mechanical equipment, a backflow prevention device is subject to wear. When\u00a0<\/span><span class=\"NormalTextRun SCXW219596561 BCX0\">certain<\/span><span class=\"NormalTextRun SCXW219596561 BCX0\">\u00a0components begin to deteriorate, flow resistance\u00a0<\/span><span class=\"NormalTextRun SCXW219596561 BCX0\">can<\/span><span class=\"NormalTextRun SCXW219596561 BCX0\">\u00a0decrease. Water then\u00a0<\/span><span class=\"NormalTextRun SCXW219596561 BCX0\">flow<\/span><span class=\"NormalTextRun SCXW219596561 BCX0\">s through the device more easily,\u00a0<\/span><span class=\"NormalTextRun SCXW219596561 BCX0\">reducing head loss and potentially increasing available pressure<\/span><span class=\"NormalTextRun SCXW219596561 BCX0\">\u00a0<\/span><span class=\"NormalTextRun SCXW219596561 BCX0\">at the points of use. In these circumstances, the\u00a0<\/span><span class=\"NormalTextRun SCXW219596561 BCX0\">BPD\u00a0<\/span><span class=\"NormalTextRun SCXW219596561 BCX0\">is no longer compliant and must be\u00a0<\/span><span class=\"NormalTextRun SCXW219596561 BCX0\">replaced<\/span><span class=\"NormalTextRun SCXW219596561 BCX0\">\u00a0or repaired.<\/span><br \/>\n<\/span><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><span data-contrast=\"auto\">However, a loss of pressure is often noticed:\u00a0<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p>\n<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"4\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"auto\">on\u00a0upper\u00a0floors,<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/li>\n<\/ul>\n<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"4\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}\" data-aria-posinset=\"2\" data-aria-level=\"1\"><span data-contrast=\"auto\">during periods of high consumption,<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/li>\n<\/ul>\n<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"4\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;multilevel&quot;}\" data-aria-posinset=\"3\" data-aria-level=\"1\"><span data-contrast=\"auto\">in buildings where available pressure is already limited.<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/li>\n<\/ul>\n<h4><strong><span class=\"TextRun SCXW129253847 BCX0\" lang=\"EN-CA\" xml:lang=\"EN-CA\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW129253847 BCX0\">Does repair\u00a0<\/span><span class=\"NormalTextRun SCXW129253847 BCX0\">eliminate<\/span><span class=\"NormalTextRun SCXW129253847 BCX0\">\u00a0pressure loss?<\/span><\/span><\/strong><span class=\"EOP Selected SCXW129253847 BCX0\" data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/h4>\n<p><span data-contrast=\"auto\">No, on the contrary! A backflow prevention device in good condition will always create some pressure\u00a0loss.<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">During a repair,\u00a0the\u00a0valves,\u00a0springs\u00a0and other\u00a0worn\u00a0components are replaced with new parts. The goal is to restore the device&#8217;s original performance, not to\u00a0eliminate\u00a0the pressure loss that is part of its normal operation.<\/span><\/p>\n<h4><strong><span class=\"TextRun SCXW4984149 BCX0\" lang=\"EN-CA\" xml:lang=\"EN-CA\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW4984149 BCX0\">Key takeaway<\/span><\/span><\/strong><span class=\"EOP Selected SCXW4984149 BCX0\" data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/h4>\n<p><span class=\"TextRun SCXW83307234 BCX0\" lang=\"EN-CA\" xml:lang=\"EN-CA\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW83307234 BCX0\">Although a backflow prevention device is not usually the primary cause of a pressure drop, it direct<\/span><span class=\"NormalTextRun SCXW83307234 BCX0\">ly affects<\/span><span class=\"NormalTextRun SCXW83307234 BCX0\">\u00a0the\u00a0<\/span><span class=\"NormalTextRun SCXW83307234 BCX0\">available\u00a0<\/span><span class=\"NormalTextRun SCXW83307234 BCX0\">pressure in the system. Since the water\u00a0<\/span><span class=\"NormalTextRun SCXW83307234 BCX0\">must<\/span><span class=\"NormalTextRun SCXW83307234 BCX0\">\u00a0pass through these internal components, some\u00a0<\/span><span class=\"NormalTextRun SCXW83307234 BCX0\">head\u00a0<\/span><span class=\"NormalTextRun SCXW83307234 BCX0\">drop is always present.\u00a0<\/span><\/span><span class=\"EOP Selected SCXW83307234 BCX0\" data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p>\n<p>Article written by : J\u00e9r\u00e9my Medeiros<\/p>\n<p>&nbsp;<\/p>\n<h4><strong><span class=\"TextRun SCXW51789795 BCX0\" lang=\"FR-CA\" xml:lang=\"FR-CA\" data-contrast=\"auto\"><span class=\"NormalTextRun SpellingErrorV2Themed SCXW51789795 BCX0\">References<\/span><span class=\"NormalTextRun SCXW51789795 BCX0\">:<\/span><\/span><\/strong><span class=\"EOP Selected SCXW51789795 BCX0\" data-ccp-props=\"{}\">\u00a0<\/span><\/h4>\n<ol>\n<li data-leveltext=\"%1.\" data-font=\"\" data-listid=\"8\" data-list-defn-props=\"{&quot;335552541&quot;:0,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769242&quot;:[65533,0],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;%1.&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"auto\">Calcady. (2026).\u00a0<\/span><i><span data-contrast=\"auto\">RPZ backflow pressure loss calculator<\/span><\/i><span data-contrast=\"auto\">. https:\/\/calcady.com\/trade\/plumbing\/rpz-backflow-pressure-loss\/\u00a0<\/span><a href=\"https:\/\/calcady.com\/trade\/plumbing\/rpz-backflow-pressure-loss\/\"><span data-contrast=\"none\">[calcady.com]<\/span><\/a><span data-contrast=\"auto\">\u00a0<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/li>\n<li data-leveltext=\"%1.\" data-font=\"\" data-listid=\"8\" data-list-defn-props=\"{&quot;335552541&quot;:0,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769242&quot;:[65533,0],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;%1.&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"auto\">Toolgrit. (2026).\u00a0<\/span><i><span data-contrast=\"auto\">Backflow preventer sizing calculator<\/span><\/i><span data-contrast=\"auto\">. https:\/\/www.toolgrit.com\/tools\/backflow-preventer-calc\u00a0<\/span><a href=\"https:\/\/www.toolgrit.com\/tools\/backflow-preventer-calc\"><span data-contrast=\"none\">[toolgrit.com]<\/span><\/a><span data-ccp-props=\"{}\">\u00a0<\/span><\/li>\n<li data-leveltext=\"%1.\" data-font=\"\" data-listid=\"8\" data-list-defn-props=\"{&quot;335552541&quot;:0,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769242&quot;:[65533,0],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;%1.&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"auto\">Piping Technology System. (s. d.).\u00a0<\/span><i><span data-contrast=\"auto\">Check valve pressure drop\u00a0calculation\u00a0formula<\/span><\/i><span data-contrast=\"auto\">. https:\/\/pipingtechs.com\/check-valve-pressure-drop-calculation-formula\/\u00a0<\/span><a href=\"https:\/\/pipingtechs.com\/check-valve-pressure-drop-calculation-formula\/\"><span data-contrast=\"none\">[pipingtechs.com]<\/span><\/a><span data-ccp-props=\"{}\">\u00a0<\/span><\/li>\n<li data-leveltext=\"%1.\" data-font=\"\" data-listid=\"8\" data-list-defn-props=\"{&quot;335552541&quot;:0,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769242&quot;:[65533,0],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;%1.&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"auto\">EZ Virtual Tools. (s. d.).\u00a0<\/span><i><span data-contrast=\"auto\">Check valve pressure drop calculator<\/span><\/i><span data-contrast=\"auto\">. https:\/\/hydraulics.ezvirtualtools.com\/calc\/check-valve.html\u00a0<\/span><a href=\"https:\/\/hydraulics.ezvirtualtools.com\/calc\/check-valve.html\"><span data-contrast=\"none\">[hydraulics&#8230; ltools.com]<\/span><\/a><span data-ccp-props=\"{}\">\u00a0<\/span><\/li>\n<li data-leveltext=\"%1.\" data-font=\"\" data-listid=\"8\" data-list-defn-props=\"{&quot;335552541&quot;:0,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769242&quot;:[65533,0],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;%1.&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"auto\">Municipality\u00a0of Sainte-Brigitte-de-Laval.\u00a0(n.d.).\u00a0<\/span><i><span data-contrast=\"auto\">L\u2019installation d\u2019un r\u00e9gulateur de pression d\u2019eau potable<\/span><\/i><span data-contrast=\"auto\">. https:\/\/sbdl.net\/capsules-municipales\/linstallation-dun-regulateur-de-pression-deau-potable\/\u00a0<\/span><a href=\"https:\/\/sbdl.net\/capsules-municipales\/linstallation-dun-regulateur-de-pression-deau-potable\/\"><span data-contrast=\"none\">[sbdl.net]<\/span><\/a><span data-ccp-props=\"{}\">\u00a0<\/span><\/li>\n<li data-leveltext=\"%1.\" data-font=\"\" data-listid=\"8\" data-list-defn-props=\"{&quot;335552541&quot;:0,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769242&quot;:[65533,0],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;%1.&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"auto\">Atlas Backflow Services. (2025).\u00a0<\/span><i><span data-contrast=\"auto\">Can a backflow preventer cause low water pressure in my building?\u00a0<\/span><\/i><a href=\"https:\/\/www.atlasbackflow.com\/post\/can-a-backflow-preventer-cause-low-water-pressure-in-my-building-1\"><span data-contrast=\"none\">https:\/\/www.atlasbackflow.com\/post\/can-a-backflow-preventer-cause-low-water-pressure-in-my-building-1<\/span><\/a><span data-contrast=\"auto\">\u00a0<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>How does a\u00a0Backflow\u00a0Prevention\u00a0Device (BPD) work? Reduced Pressure\u00a0Principle\u00a0Backflow Preventer\u00a0Assembly\u00a0(RP)\u00a0and Double\u00a0Check Valve\u00a0Backflow Preventer Assembly\u00a0(DCVA) are designed to prevent water from\u00a0coming back\u00a0in the wrong direction and thus protect the drinking water\u00a0network\u00a0from backflow. They use valves held closed by springs.\u00a0For water to pass through the device, the\u00a0network\u00a0pressure must first\u00a0exceed\u00a0the resistance created by these springs. If back pressure or siphoning [&hellip;]<\/p>\n","protected":false},"author":22,"featured_media":4452,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[60,58],"tags":[],"class_list":["post-4453","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-products","category-tips"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The impact of Backflow Prevention Devices on water pressure - Backflo Shop<\/title>\n<meta name=\"description\" content=\"Bien qu&#039;un dispositif antirefoulement ne soit pas habituellement la principale cause d&#039;une baisse de pression, il influence directement la pression disponible dans le r\u00e9seau.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/backflow-shop.com\/en\/the-impact-of-backflow-prevention-devices-on-water-pressure\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The impact of Backflow Prevention Devices on water pressure - 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