{"product_id":"premium-sanking-upvc-flapper-check-valve-20-63mm-horizontal-vertical-mount-non-return-valve-anti-siphon-plumbing","title":"Premium SanKing UPVC Flapper Check Valve (20-63mm) | Horizontal \u0026 Vertical Mount Non-Return Valve | Anti-Siphon Plumbing","description":"\u003cdiv style=\"background-color: #f8f9fa; padding: 10px; border-left: 4px solid #6c757d; margin-bottom: 20px;\"\u003e\u003cp style=\"margin: 0;\"\u003e\u003cem\u003e🔄 Want to visually monitor the internal flap for clogs? Check out our \u003cstrong\u003e\u003ca href=\"https:\/\/atradesen.com\/collections\/upvc-pvc-valves\/products\/premium-clear-upvc-true-union-swing-check-valve-20-63mm-aquarium-anti-siphon-flap-valve-horizontal-vertical-mount?_pos=1\u0026amp;_sid=c936c7797\u0026amp;_ss=r\" style=\"color: #6c757d; text-decoration: underline;\"\u003ePremium Clear UPVC Swing Check Valves\u003c\/a\u003e\u003c\/strong\u003e.\u003c\/em\u003e\u003c\/p\u003e\u003c\/div\u003e\u003ch2\u003ePremium SanKing UPVC Flapper Check Valve\u003c\/h2\u003e\u003cp\u003eProtect your water pumps and prevent catastrophic back-siphoning floods with the SanKing Grey-Black Flapper Check Valve from \u003cstrong\u003eAtradesen.com\u003c\/strong\u003e. Engineered for professional sumps, marine reef tanks, and critical water supply lines, this highly reliable non-return valve ensures water only flows in one direction while perfectly matching the sleek, stealthy look of grey UPVC plumbing setups.\u003c\/p\u003e\u003ch3\u003e🌟 Advanced Flap Design \u0026amp; Ultimate Convenience\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHorizontal OR Vertical Mounting:\u003c\/strong\u003e Unlike \"Lift\/Ball\" style check valves that only work straight up and down, this advanced \"Swing\/Flap\" mechanism works flawlessly whether installed vertically or completely flat (horizontally)!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Flow Resistance \u0026amp; Quiet:\u003c\/strong\u003e The swinging flap design creates significantly less water friction and head pressure loss than spring-loaded valves, resulting in a smoother, quieter operation that won't choke your pump's output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100% Metal-Free \u0026amp; Safe:\u003c\/strong\u003e Constructed purely from chemical-grade UPVC with zero metal components. Highly resistant to acids\/alkalis and completely safe for saltwater reef aquariums.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnion Nut Design:\u003c\/strong\u003e Features a threaded union collar on one end, allowing you to easily detach the pipe section for future maintenance or replacement.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003e⚠️ Installation \u0026amp; Sizing Guide (Crucial!)\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eEnsure a flawless, leak-proof setup by reviewing the Atradesen.com guidelines below:\u003c\/p\u003e\u003cul style=\"background-color: #fff3cd; padding: 15px 15px 15px 35px; border-radius: 5px; color: #856404;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e🚨 DIRECTIONAL INSTALLATION:\u003c\/strong\u003e Check valves only let water flow in ONE direction. You MUST install the valve so the large molded arrow on the body points in the direction of your pump's water flow!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e🚨 SIZING LOGIC (Inner Dia. matches Outer Dia.):\u003c\/strong\u003e The sizes listed (e.g., 32mm) refer to the \u003cb\u003eInner Diameter (I.D.)\u003c\/b\u003e of the sockets. They are designed to sleeve \u003cb\u003eOVER\u003c\/b\u003e your rigid PVC pipes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Method:\u003c\/strong\u003e PVC waterproof adhesive\/glue MUST be used on the slip joints to secure your pipes permanently.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Atradesen","offers":[{"title":"20mm I.D. (DN15 | Horizontal\/Vertical OK)","offer_id":56664285839526,"sku":null,"price":9.98,"currency_code":"USD","in_stock":true},{"title":"25mm I.D. (DN20 | Horizontal\/Vertical OK)","offer_id":56664285872294,"sku":null,"price":11.45,"currency_code":"USD","in_stock":true},{"title":"32mm I.D. (DN25 | Horizontal\/Vertical OK)","offer_id":56664285905062,"sku":null,"price":13.77,"currency_code":"USD","in_stock":true},{"title":"40mm I.D. (DN32 | Horizontal\/Vertical OK)","offer_id":56664285937830,"sku":null,"price":18.97,"currency_code":"USD","in_stock":true},{"title":"50mm I.D. (DN40 | Horizontal\/Vertical OK)","offer_id":56664285970598,"sku":null,"price":21.36,"currency_code":"USD","in_stock":true},{"title":"63mm I.D. (DN50 | Horizontal\/Vertical OK)","offer_id":56664286003366,"sku":null,"price":32.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/2588\/6118\/files\/Premium_SanKing_UPVC_Flapper_Check_Valve_20-63mm_Horizontal_Vertical_Mount_Non-Return_Valve_Anti-Siphon_Plumbing-001.png?v=1781586216","url":"https:\/\/atradesen.com\/products\/premium-sanking-upvc-flapper-check-valve-20-63mm-horizontal-vertical-mount-non-return-valve-anti-siphon-plumbing","provider":"Atradesen","version":"1.0","type":"link"}