Perfectly suited for indoor / outdoor use in pumps systems, water features, or appliance connection where temperature fluctuations demand robust brass valves Crafted from premium brass, this 0.5 inch check valves erosion resistance, high temperature durability, and leak proof for long lasting water flows control in plumbing systems Each set includes two heavy duty not return valves engineered to maintain unidirectional liquid flows when horizontally installed, minimizing pressure loss and systems downtime Ideal for plumbers, homeowners, and garden enthusiasts maintaining irrigation setups, washing machines, or outdoor fountain installations requiring stable valves solution Featuring general G1 / 2 " compatibility with standard pipes and hoses, its threaded design ensures easy installation while backflow in pressurized liquid systems, Manufacturer: Obotsnoi