CORRECT DECISION: You are buying a quality non-return valve from controlled production according to French standards PERFECT CONNECTION: Our check valve can be connected to all pipes, hoses and fittings with 1 1/2" inch external thread in accordance with BSP BEST QUALITY: Our strong and durable high quality brass check valve provides protection against unwanted backflow. It is also rustproof and can withstand high temperatures and pressures OPTIMAL FIT: Thanks to the robust material, the spring and the high-quality seal, not a drop will slip through. With just a few turns, you screw in our leak-proof non-return valve
