Description: 【Premium Material】: The RV city water inlet is made of brass, which have resistance, impact resistance, suitable for long term outdoor use 【Built in Check Valve】: The RV inlet is equipped with a check valve/anti backflow device, which can prevent harmful pollutants from entering the RV fresh water tank, and will not leak again when using the water tank and pump to take water, avoiding water waste 【Multiple Protection】: The RV fresh water fill adapter is equipped with double protection of rubber dust cover and filter block, effectively preventing dust and debris from entering the valve and ensuring the purity of the water source connected to the RV 【Heavy Duty Brass Sealing】: The flange pipe and thread of the water inlet connector are made of brass, which has better sealing durability , can withstand high pressure and extreme temperatures, is not easy to rust, and has a long service life 【Widely Applicable】: The RV water fill inlet threaded interface has an outer end of 3/4-11.5NH and an inner end of 1/2-14NPT, suit for standard hose fittings and suitable for RVs, trailers, boats, and off grid water supply systems Specification: Material: PP Brass    Size Chart: Diameter: 12cm/4.72inch Package Size: 14cmx10cmx9.5cm/5.51inchx3.94inchx3.74inch  Package Includes: 1 Water Valve 3 Screw  Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.