1 1/2 Inch Check Valve Made Of Heavy-duty Brass, Rust-proof And Leak-proof For A Pump, Washing Machine CORRECT DECISION: You are buying a quality check 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 conforming to BSP BEST QUALITY: Our strong and durable brass check valve provides protection against unwanted backflow. It is also rust proof and can withstand high temperatures and pressures OPTIMAL FIT: Thanks to the robust material, the spring and the seal, not a drop will get through.Within a few turns, you screw our valve watertight non-return Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.