{"id":9582,"date":"2026-04-24T04:49:58","date_gmt":"2026-04-24T04:49:58","guid":{"rendered":"https:\/\/prudenceeng.lk\/shop\/?post_type=product&#038;p=9582"},"modified":"2026-04-24T10:59:44","modified_gmt":"2026-04-24T10:59:44","slug":"pvc-double-union-check-non-return-valve","status":"publish","type":"product","link":"https:\/\/prudenceeng.lk\/shop\/pvc-double-union-check-non-return-valve\/","title":{"rendered":"PVC Double Union Check (Non-Return) Valve"},"content":{"rendered":"<p>Industrial PVC Double Union Check Valve \u2013 High-Pressure Non-Return Valve for Pump Protection &amp; Water Treatment (20mm &#8211; 63mm)<\/p>\n<h3 data-path-to-node=\"10\"><b data-path-to-node=\"10\" data-index-in-node=\"0\">The Fail-Safe Solution for Pump Systems<\/b><\/h3>\n<p data-path-to-node=\"11\">Backflow is the leading cause of pump failure and system contamination. The <b data-path-to-node=\"11\" data-index-in-node=\"76\">PVC Double Union Check (Non-Return) Valve<\/b>\u00a0provides a robust mechanical barrier that allows water to flow in one direction only. When the pump stops, the valve closes instantly, preventing the &#8220;water hammer&#8221; effect and keeping the pump primed. In Sri Lanka\u2019s agricultural and industrial sectors, this valve is essential for ensuring that water doesn&#8217;t drain back into the well or tank.<\/p>\n<h3 data-path-to-node=\"12\"><b data-path-to-node=\"12\" data-index-in-node=\"0\">Key Features &amp; Benefits:<\/b><\/h3>\n<ul data-path-to-node=\"13\">\n<li>\n<p data-path-to-node=\"13,0,0\"><b data-path-to-node=\"13,0,0\" data-index-in-node=\"0\">Double Union Convenience:<\/b> Unlike standard check valves that are glued permanently into place, the double union design features threaded collars. If the valve gets blocked by sand or debris, you can simply unscrew the union nuts, clean the internal mechanism, and put it back\u2014saving you the cost of replacing pipes.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"13,1,0\"><b data-path-to-node=\"13,1,0\" data-index-in-node=\"0\">Superior Pump Protection:<\/b> By maintaining a column of water in the suction pipe, this valve keeps your pump primed and ready for the next cycle. This prevents dry-running and extends the life of your motor and impellers.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"13,2,0\"><b data-path-to-node=\"13,2,0\" data-index-in-node=\"0\">Corrosion &amp; Chemical Resistance:<\/b> Manufactured from premium <b data-path-to-node=\"13,2,0\" data-index-in-node=\"59\">PVC<\/b>, these valves are immune to rust and resistant to common agricultural chemicals and fertilizers. They are perfectly suited for the humid and coastal conditions of Sri Lanka.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"13,3,0\"><b data-path-to-node=\"13,3,0\" data-index-in-node=\"0\">Versatile Installation:<\/b> These valves can be installed both <b data-path-to-node=\"13,3,0\" data-index-in-node=\"59\">horizontally and vertically<\/b> (upward flow), making them adaptable to tight plumbing manifolds in guesthouses, factories, or home pump sheds.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"13,4,0\"><b data-path-to-node=\"13,4,0\" data-index-in-node=\"0\">Bubble-Tight Sealing:<\/b> Equipped with industrial-grade <b data-path-to-node=\"13,4,0\" data-index-in-node=\"53\">EPDM O-rings<\/b> and a precision-engineered spring or ball, the valve ensures a zero-leakage shut-off even under low back-pressure.<\/p>\n<\/li>\n<\/ul>\n<h3 data-path-to-node=\"14\"><b data-path-to-node=\"14\" data-index-in-node=\"0\">Typical Applications in Sri Lanka:<\/b><\/h3>\n<ul data-path-to-node=\"15\">\n<li>\n<p data-path-to-node=\"15,0,0\"><b data-path-to-node=\"15,0,0\" data-index-in-node=\"0\">Domestic Water Pumps:<\/b> Keeping the pump primed and preventing tank water from flowing back into the well.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"15,1,0\"><b data-path-to-node=\"15,1,0\" data-index-in-node=\"0\">Industrial RO Plants:<\/b> Protecting high-pressure membranes from back-pressure surges.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"15,2,0\"><b data-path-to-node=\"15,2,0\" data-index-in-node=\"0\">Commercial Swimming Pools:<\/b> Ensuring water flows correctly through the filtration and heating loops.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"15,3,0\"><b data-path-to-node=\"15,3,0\" data-index-in-node=\"0\">Modern Agriculture:<\/b> Essential for fertigation and drip irrigation systems to prevent chemical backflow into the water source.<\/p>\n<\/li>\n<\/ul>\n<h3 data-path-to-node=\"16\"><b data-path-to-node=\"16\" data-index-in-node=\"0\">Technical Specifications:<\/b><\/h3>\n<table data-path-to-node=\"17\">\n<thead>\n<tr>\n<td><strong>Feature<\/strong><\/td>\n<td><strong>Detail<\/strong><\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span data-path-to-node=\"17,1,0,0\"><b data-path-to-node=\"17,1,0,0\" data-index-in-node=\"0\">Material<\/b><\/span><\/td>\n<td><span data-path-to-node=\"17,1,1,0\">High-Grade PVC (Lead-Free)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"17,2,0,0\"><b data-path-to-node=\"17,2,0,0\" data-index-in-node=\"0\">Sizes Available<\/b><\/span><\/td>\n<td><span data-path-to-node=\"17,2,1,0\">20mm (1\/2&#8243;), 25mm (3\/4&#8243;), 32mm (1&#8243;), 40mm (1 1\/4&#8243;), 50mm (1 1\/2&#8243;), 63mm (2&#8243;)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"17,3,0,0\"><b data-path-to-node=\"17,3,0,0\" data-index-in-node=\"0\">Mechanism<\/b><\/span><\/td>\n<td><span data-path-to-node=\"17,3,1,0\">Spring-Loaded or Ball Check<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"17,4,0,0\"><b data-path-to-node=\"17,4,0,0\" data-index-in-node=\"0\">End Connections<\/b><\/span><\/td>\n<td><span data-path-to-node=\"17,4,1,0\">Solvent Cement (Socket) \/ Compatible with S-Lon &amp; Anton pipes<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"17,5,0,0\"><b data-path-to-node=\"17,5,0,0\" data-index-in-node=\"0\">Pressure Rating<\/b><\/span><\/td>\n<td><span data-path-to-node=\"17,5,1,0\">PN10 (150 PSI)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"17,6,0,0\"><b data-path-to-node=\"17,6,0,0\" data-index-in-node=\"0\">Seal Material<\/b><\/span><\/td>\n<td><span data-path-to-node=\"17,6,1,0\">EPDM (Industrial Grade)<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p data-path-to-node=\"6\">Prevent backflow and protect your pumps with our <b data-path-to-node=\"6\" data-index-in-node=\"49\">PVC Double Union Check (Non-Return) Valve<\/b>. Specifically designed for the high-demand environments of Sri Lanka, this &#8220;True Union&#8221; valve allows for easy inspection and cleaning without dismantling your pipe network. Featuring a <b data-path-to-node=\"6\" data-index-in-node=\"263\">spring-loaded or ball-check mechanism<\/b>, it ensures a 100% leak-proof, one-way flow for water tanks, irrigation lines, and Reverse Osmosis (RO) systems.<\/p>\n<ul data-path-to-node=\"7\">\n<li>\n<p data-path-to-node=\"7,0,0\"><b data-path-to-node=\"7,0,0\" data-index-in-node=\"0\">Design:<\/b> Double Union (True Union) \u2013 easily detachable for maintenance.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,1,0\"><b data-path-to-node=\"7,1,0\" data-index-in-node=\"0\">Function:<\/b> One-way flow control (Non-Return) to prevent pump damage from backflow.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,2,0\"><b data-path-to-node=\"7,2,0\" data-index-in-node=\"0\">Material:<\/b> UV-stabilized, high-impact PVC with chemical-resistant EPDM seals.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,3,0\"><b data-path-to-node=\"7,3,0\" data-index-in-node=\"0\">Flow:<\/b> High-flow design with minimal pressure drop.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,4,0\"><b data-path-to-node=\"7,4,0\" data-index-in-node=\"0\">Pressure Rating:<\/b> Rated for <b data-path-to-node=\"7,4,0\" data-index-in-node=\"27\">PN10 \/ 150 PSI<\/b>, ideal for booster pumps and main lines.<\/p>\n<\/li>\n<\/ul>\n","protected":false},"featured_media":9607,"comment_status":"open","ping_status":"closed","template":"","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":"default","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 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