{"id":23289,"date":"2025-07-22T11:04:03","date_gmt":"2025-07-22T03:04:03","guid":{"rendered":"https:\/\/ifanplus.com\/?p=23289"},"modified":"2025-07-22T11:04:06","modified_gmt":"2025-07-22T03:04:06","slug":"understanding-the-role-of-a-1-2-check-valve-in-flow-control","status":"publish","type":"post","link":"https:\/\/ifanplus.com\/ar\/%d9%85%d8%b9%d8%b1%d9%81%d8%a9\/understanding-the-role-of-a-1-2-check-valve-in-flow-control\/","title":{"rendered":"Understanding the Role of a 1\/2 Check Valve in Flow Control"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Flow control plays a crucial role in plumbing, irrigation, and industrial fluid systems. Among various devices designed to manage fluid direction and pressure, the<a href=\"https:\/\/ifanplus.com\/ar\/product-category\/%d8%b5%d9%86%d8%a7%d8%b9%d8%a9-%d8%a7%d9%84%d9%86%d8%ad%d8%a7%d8%b3\/%d8%b5%d9%85%d8%a7%d9%85-%d9%86%d8%ad%d8%a7%d8%b3%d9%8a\/\"> \u0635\u0645\u0627\u0645 \u0646\u062d\u0627\u0633\u064a<\/a> stands out as an effective and simple component. This valve ensures fluid flows in one direction only, preventing backflow that can damage equipment, contaminate water supplies, and reduce system efficiency.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This article explores the essential role of the 1\/2 check valve in flow control. We will cover its basic definition and features, common applications across different industries, tips for selecting the right valve, and a comparison with other piping components. Whether you are a homeowner, technician, or engineer, understanding this valve helps optimize fluid systems for safety and performance.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-frequently-asked-questions-faq\">\u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0627\u0644\u0634\u0627\u0626\u0639\u0629<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>What is a 1\/2 check valve?<\/strong><br>It is a valve with a half-inch connection that automatically allows fluid to flow forward but blocks any backward flow.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Why is flow control important in plumbing systems?<\/strong><br>Proper flow control prevents contamination, pressure damage, and ensures efficient operation of pumps and appliances.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Where can I install a 1\/2 check valve?<\/strong><br>Common installation points include water heaters, irrigation lines, washing machines, and filtration systems.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Is the 1\/2 check valve easy to maintain?<\/strong><br>Yes, these valves require minimal maintenance, but periodic inspection ensures long-term reliability.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>How do I choose the best 1\/2 check valve for my system?<\/strong><br>Consider material compatibility, pressure ratings, connection types, and relevant certifications for your specific application.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-is-a-1-2-check-valve-and-what-are-its-features\">What Is a 1\/2 Check Valve and What Are Its Features?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0623 <strong>1\/2 check valve<\/strong> is a type of non-return valve designed specifically for pipes with a 1\/2-inch diameter. It allows fluid to pass only in one direction, closing automatically when flow tries to reverse.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-key-features\">\u0627\u0644\u0645\u064a\u0632\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Automatic Operation:<\/strong> The valve opens when fluid pushes forward and closes instantly to prevent backflow.<\/li>\n\n\n\n<li><strong>\u062a\u0635\u0645\u064a\u0645 \u0645\u0636\u063a\u0648\u0637:<\/strong> Small size fits easily into residential or commercial piping systems.<\/li>\n\n\n\n<li><strong>Material Variety:<\/strong> Commonly available in brass, stainless steel, and PVC, depending on application needs.<\/li>\n\n\n\n<li><strong>Flow Direction Marking:<\/strong> Most valves include an arrow indicating correct installation.<\/li>\n\n\n\n<li><strong>\u0645\u062a\u0627\u0646\u0629:<\/strong> Resistant to corrosion, pressure, and temperature variations within their rated specifications.<\/li>\n\n\n\n<li><strong>\u0635\u064a\u0627\u0646\u0629 \u0645\u0646\u062e\u0641\u0636\u0629:<\/strong> Requires minimal upkeep to maintain effective performance.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These features make the 1\/2 check valve a reliable and user-friendly choice for managing flow in diverse fluid systems.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-common-uses-and-industries-for-1-2-check-valves\">Common Uses and Industries for 1\/2 Check Valves<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The 1\/2 check valve is widely used in numerous applications to prevent reverse flow and protect systems from damage.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-residential-use\">\u0627\u0644\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u0633\u0643\u0646\u064a<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Water Heaters:<\/strong> Prevents hot water from flowing back into the cold water line.<\/li>\n\n\n\n<li><strong>Laundry Machines:<\/strong> Stops wastewater from flowing backward into the clean water supply.<\/li>\n\n\n\n<li><strong>Under-Sink Filters:<\/strong> Ensures treated water does not mix with untreated supply water.<\/li>\n\n\n\n<li><strong>Outdoor Faucets and Irrigation:<\/strong> Prevents garden chemicals or dirt from contaminating household water.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-irrigation-and-agricultural-applications\">\u062a\u0637\u0628\u064a\u0642\u0627\u062a \u0627\u0644\u0631\u064a \u0648\u0627\u0644\u0632\u0631\u0627\u0639\u0629<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Drip Irrigation Systems:<\/strong> Prevents back-siphoning that can introduce contaminants.<\/li>\n\n\n\n<li><strong>Sprinkler Systems:<\/strong> Protects the water supply from debris or fertilizer backflow.<\/li>\n\n\n\n<li><strong>Fertigation:<\/strong> Ensures chemicals do not flow back into water tanks.<\/li>\n\n\n\n<li><strong>Livestock Watering:<\/strong> Maintains safe water supply by preventing contamination.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-light-industrial-and-commercial-uses\">Light Industrial and Commercial Uses<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Chemical Processing:<\/strong> Protects against harmful reverse flow in small chemical transfer lines.<\/li>\n\n\n\n<li><strong>Pump Systems:<\/strong> Prevents damage from pressure surges by maintaining flow direction.<\/li>\n\n\n\n<li><strong>\u0645\u062d\u0637\u0627\u062a \u0645\u0639\u0627\u0644\u062c\u0629 \u0627\u0644\u0645\u064a\u0627\u0647:<\/strong> Ensures one-way flow during filtration and dosing processes.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The versatility of the 1\/2 check valve allows it to serve many industries with reliable backflow prevention.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-to-choose-the-right-1-2-check-valve\">How to Choose the Right 1\/2 Check Valve<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Selecting a 1\/2 check valve that fits your system needs involves evaluating several important factors.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-material\">\u0645\u0627\u062f\u0629<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u0627\u0644\u0646\u062d\u0627\u0633:<\/strong> Durable and corrosion-resistant, suitable for potable water and household plumbing.<\/li>\n\n\n\n<li><strong>\u0628\u0648\u0644\u064a \u0643\u0644\u0648\u0631\u064a\u062f \u0627\u0644\u0641\u064a\u0646\u064a\u0644:<\/strong> Lightweight and cost-effective, ideal for irrigation and outdoor applications.<\/li>\n\n\n\n<li><strong>\u0627\u0644\u0641\u0648\u0644\u0627\u0630 \u0627\u0644\u0645\u0642\u0627\u0648\u0645 \u0644\u0644\u0635\u062f\u0623:<\/strong> Strong and chemically resistant, perfect for industrial or harsh environments.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-connection-type\">\u0646\u0648\u0639 \u0627\u0644\u0627\u062a\u0635\u0627\u0644<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u0645\u064f\u0644\u0648\u0644\u0628 (NPT):<\/strong> Most common for home plumbing.<\/li>\n\n\n\n<li><strong>Socket\/Slip:<\/strong> Used with PVC pipes in irrigation systems.<\/li>\n\n\n\n<li><strong>Push-Fit or Compression:<\/strong> Allows for easy DIY installation without tools.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-pressure-and-temperature-ratings\">\u062a\u0635\u0646\u064a\u0641\u0627\u062a \u0627\u0644\u0636\u063a\u0637 \u0648\u062f\u0631\u062c\u0629 \u0627\u0644\u062d\u0631\u0627\u0631\u0629<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ensure the valve can withstand your system\u2019s maximum operating pressure and temperature.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-certifications\">\u0627\u0644\u0634\u0647\u0627\u062f\u0627\u062a<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Look for certifications like NSF\/ANSI for drinking water safety or UPC\/CSA for plumbing code compliance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-flow-direction-and-installation\">Flow Direction and Installation<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Choose valves with clear directional arrows and instructions to guarantee correct installation and effective performance.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-understanding-the-role-of-a-1-2-check-valve-in-flow-control-systems\">Understanding the Role of a 1\/2 Check Valve in Flow Control Systems<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The 1\/2 check valve plays a vital role in maintaining fluid system integrity. It prevents reverse flow that can cause contamination or pressure damage. For instance, in residential plumbing, it stops wastewater from entering clean water lines. In irrigation, it protects water tanks from fertilizer backflow.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Moreover, it helps maintain system pressure and reduces wear on pumps by preventing flow reversal. This automatic function requires no manual operation, ensuring continuous protection even when the system is unattended.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Its compact size allows installation in tight spaces, making it suitable for retrofit projects or new builds. Altogether, the 1\/2 check valve is a simple but effective device for flow control.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-comparison-1-2-check-valve-vs-other-common-valves\">Comparison: 1\/2 Check Valve vs Other Common Valves<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u0645\u064a\u0632\u0629<\/th><th>1\/2 Check Valve<\/th><th>\u0635\u0645\u0627\u0645 \u0627\u0644\u0643\u0631\u0629<\/th><th>\u0635\u0645\u0627\u0645 \u0627\u0644\u0628\u0648\u0627\u0628\u0629<\/th><th>\u0635\u0645\u0627\u0645 \u0643\u0631\u0648\u064a<\/th><\/tr><\/thead><tbody><tr><td>\u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u062f\u0641\u0642<\/td><td>One-way only<\/td><td>On\/off (manual)<\/td><td>On\/off (manual)<\/td><td>\u062a\u0646\u0638\u064a\u0645 \u0627\u0644\u062a\u062f\u0641\u0642<\/td><\/tr><tr><td>\u0639\u0645\u0644\u064a\u0629<\/td><td>Automatic<\/td><td>\u064a\u062f\u0648\u064a<\/td><td>\u064a\u062f\u0648\u064a<\/td><td>\u064a\u062f\u0648\u064a<\/td><\/tr><tr><td>\u0646\u0637\u0627\u0642 \u0627\u0644\u062d\u062c\u0645<\/td><td>Small (1\/2 inch)<\/td><td>All sizes<\/td><td>Medium to large<\/td><td>Medium to large<\/td><\/tr><tr><td>\u0635\u064a\u0627\u0646\u0629<\/td><td>\u0642\u0644\u064a\u0644<\/td><td>\u0642\u0644\u064a\u0644<\/td><td>\u0648\u0627\u0633\u0637\u0629<\/td><td>\u0648\u0627\u0633\u0637\u0629<\/td><\/tr><tr><td>\u0637\u0644\u0628<\/td><td>Backflow prevention<\/td><td>Flow shutoff<\/td><td>Line isolation<\/td><td>Flow throttling<\/td><\/tr><tr><td>\u0633\u0647\u0648\u0644\u0629 \u0627\u0644\u062a\u062b\u0628\u064a\u062a<\/td><td>\u0633\u0647\u0644<\/td><td>\u0633\u0647\u0644<\/td><td>\u0645\u0639\u062a\u062f\u0644<\/td><td>\u0645\u0639\u062a\u062f\u0644<\/td><\/tr><tr><td>Flow Direction Indicator<\/td><td>\u0646\u0639\u0645<\/td><td>\u0644\u0627<\/td><td>\u0644\u0627<\/td><td>\u0644\u0627<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The 1\/2 check valve\u2019s automatic prevention of reverse flow is its key advantage over manual valves that only start or stop fluid movement.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-conclusion\">\u062e\u0627\u062a\u0645\u0629<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0627\u0644 <strong>1\/2 check valve<\/strong> serves an important role in flow control by preventing backflow, protecting equipment, and maintaining system integrity. Its compact size, reliable automatic operation, and versatile applications make it a trusted component in plumbing, irrigation, and industrial fluid systems.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Choosing the right valve involves careful consideration of material, connection type, pressure ratings, and certifications. Proper installation ensures optimal performance and a leak-free system.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Whether in residential water lines, agricultural irrigation, or commercial setups, the 1\/2 check valve offers an efficient, low-maintenance solution to critical flow control challenges.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-contact-ifan-for-catalogs-and-samples\">\u0627\u062a\u0635\u0644 \u0628\u0640 IFAN \u0644\u0644\u062d\u0635\u0648\u0644 \u0639\u0644\u0649 \u0627\u0644\u0643\u062a\u0627\u0644\u0648\u062c\u0627\u062a \u0648\u0627\u0644\u0639\u064a\u0646\u0627\u062a<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0647\u0644 \u062a\u062d\u062a\u0627\u062c \u0625\u0644\u0649 \u0645\u0633\u062a\u0646\u062f\u0627\u062a \u0641\u0646\u064a\u0629 \u0623\u0648 \u0643\u062a\u0627\u0644\u0648\u062c\u0627\u062a \u0623\u0648 \u0646\u0645\u0627\u0630\u062c \u0645\u0646\u062a\u062c\u0627\u062a\u061f \u062a\u0648\u0627\u0635\u0644 \u0645\u0639 IFAN \u0627\u0644\u064a\u0648\u0645.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udce7 \u0627\u0644\u0628\u0631\u064a\u062f \u0627\u0644\u0625\u0644\u0643\u062a\u0631\u0648\u0646\u064a:<a href=\"https:\/\/ifanplus.com\/ar\/%d9%85%d8%b9%d8%b1%d9%81%d8%a9\/trusted-quality-polyvinyl-chloride-pipes\/jack%40ifangroup.com\/\">&nbsp;jack@ifangroup.com<\/a><br>\ud83d\udcf1 \u0648\u0627\u062a\u0633\u0627\u0628:&nbsp;<a href=\"https:\/\/api.whatsapp.com\/send?l=en&amp;phone=8619857948982\">+86 19857948982<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u064a\u0633\u062a\u062c\u064a\u0628 \u0641\u0631\u064a\u0642\u0646\u0627 \u0628\u0633\u0631\u0639\u0629 \u0648\u064a\u0648\u0641\u0631 \u0627\u0644\u062f\u0639\u0645 \u0627\u0644\u0645\u0647\u0646\u064a \u0644\u062c\u0645\u064a\u0639 \u0627\u062d\u062a\u064a\u0627\u062c\u0627\u062a \u062e\u0637 \u0627\u0644\u0623\u0646\u0627\u0628\u064a\u0628 \u0627\u0644\u062e\u0627\u0635 \u0628\u0643.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-ifan-international-standard\">\u0645\u0639\u064a\u0627\u0631 IFAN \u0627\u0644\u062f\u0648\u0644\u064a<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u062a\u0644\u062a\u0632\u0645 \u0623\u0646\u0638\u0645\u0629 \u0623\u0646\u0627\u0628\u064a\u0628 IFAN \u0628\u0645\u062c\u0645\u0648\u0639\u0629 \u0648\u0627\u0633\u0639\u0629 \u0645\u0646 \u0627\u0644\u0645\u0639\u0627\u064a\u064a\u0631 \u0627\u0644\u062f\u0648\u0644\u064a\u0629 \u0644\u0636\u0645\u0627\u0646 \u0627\u0644\u062c\u0648\u062f\u0629 \u0648\u0627\u0644\u0623\u062f\u0627\u0621 \u0627\u0644\u0639\u0627\u0644\u064a. \u0648\u062a\u0634\u0645\u0644 \u0647\u0630\u0647 \u0627\u0644\u0645\u0639\u0627\u064a\u064a\u0631 ASTM F1974 \u0648ASTM F1281 \u0644\u0623\u0646\u0638\u0645\u0629 \u0627\u0644\u0623\u0646\u0627\u0628\u064a\u0628 \u0645\u062a\u0639\u062f\u062f\u0629 \u0627\u0644\u0637\u0628\u0642\u0627\u062a\u060c \u0648CSA B137 \u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a \u0627\u0644\u0633\u0628\u0627\u0643\u0629 \u0627\u0644\u0643\u0646\u062f\u064a\u0629\u060c \u0648DIN 16836 \u0644\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0641\u0646\u064a\u0629 \u0627\u0644\u0623\u0644\u0645\u0627\u0646\u064a\u0629\u060c \u0648GB18997 \u0644\u0644\u0645\u0639\u0627\u064a\u064a\u0631 \u0627\u0644\u0635\u064a\u0646\u064a\u0629\u060c \u0648ISO 21003\u060c \u0627\u0644\u062a\u064a \u062a\u063a\u0637\u064a \u0623\u0646\u0638\u0645\u0629 \u0627\u0644\u0623\u0646\u0627\u0628\u064a\u0628 \u0645\u062a\u0639\u062f\u062f\u0629 \u0627\u0644\u0637\u0628\u0642\u0627\u062a \u0627\u0644\u0645\u0633\u062a\u062e\u062f\u0645\u0629 \u0641\u064a \u062a\u0631\u0643\u064a\u0628\u0627\u062a \u0627\u0644\u0645\u064a\u0627\u0647 \u0627\u0644\u0633\u0627\u062e\u0646\u0629 \u0648\u0627\u0644\u0628\u0627\u0631\u062f\u0629. \u0648\u064a\u0624\u0643\u062f \u0647\u0630\u0627 \u0627\u0644\u0646\u0637\u0627\u0642 \u0627\u0644\u0648\u0627\u0633\u0639 \u0645\u0646 \u0627\u0644\u0627\u0639\u062a\u0645\u0627\u062f\u0627\u062a \u0627\u0644\u062a\u0632\u0627\u0645 IFAN \u0628\u0627\u0644\u0627\u0645\u062a\u062b\u0627\u0644 \u0627\u0644\u0639\u0627\u0644\u0645\u064a \u0648\u0645\u0648\u062b\u0648\u0642\u064a\u0629 \u0627\u0644\u0645\u0646\u062a\u062c\u0627\u062a.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-\"><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Flow control plays a crucial role in plumbing, irrigation, and industrial fluid systems. Among various devices designed to manage fluid direction and pressure, the brass valve stands out as an effective and simple component. This valve ensures fluid flows in one direction only, preventing backflow that can damage equipment, contaminate water supplies, and reduce system [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":23290,"comment_status":"closed","ping_status":"closed","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":"","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":[13],"tags":[662,663,665,664],"class_list":["post-23289","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-1-2-check-valve","tag-brass-check-valve","tag-check-valve","tag-check-valves-for-water"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.7 (Yoast SEO v27.9) - 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