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Manufactured from DZR Brass with EPDM seals and stainless steel spring, these brass single check valves are WRAS approved and used for preventing backflow and back-siphonage. They are suitable for all Class 2 contamination risks.Features & Benefits: Reliance Water Controls Female x Female Brass Single Check Valve - 1 1/2 inch, DZR Brass Body, EPDM Seals, Acetyl Copolymer Check Cartridges, Stainless Steel Spring, Working Pressure 0.1 Bar Minimum and 16 Bar Maximum, Maximum Temperature 80 degrees Celsius. Reliance Water Controls Female x Female Brass Single Check Valve - 1 1/2 inch Reliance Water Controls (RWC) FLOW235008