Stainless Steel Backflow Preventer Pangaea Tech Universal Check Valve 1 Inch - Stainless Backflow Brass Check Valve With Internal Thread Highest safety – the Pangaea Tech return valve prevents unwanted backflow of liquids – for example in garden pumps, heating and drinking water pipes 1-16 of over 2,000 results for "1/2 inch backflow preventer" Results Check each product page for other buying options. Price and other details may vary based on product size and color Load capacity: the check valve can hold up to 16 bar (ideal operating pressure: 2-8 bar). Aazon.co: Joywayus 2 PCS Brass Check Valve 1/2 NPT Feale Thread and... Check valve garden pump, check valve heating gravity brake 1/2 inch, check valve 1/2 inch, fountain check valve, check valve hose, gravity brake heating, check valve for pump, check valve suction hose, check valve 32 mm, check valve garden hose plastic intake hose swing pump Zurn Wilkins - 350ASTL Series, Stainless Steel - Backflow Preventer - Deeco PANGAEA TECH has stood for expertise in the field of check valves, fittings and installation accessories for years