Description: 【City Water Connection For RV】: RV city water inlet with check valve, 3/4 "-11.5 NH external thread (compatible with standard drinking water hoses), 1/2 "-14 NPT internal thread (compatible with RV water supply system), seamlessly connecting your drinking water hose to RV water systems, offering strong adaptability 【Quality Construction】: The RV Water Fill Inlet Connection replacement is made of ABS, brass and silicone, keeping your water secure to drink, withstand high pressure, temperature to and long term daily use 【Anti-Backflow Design】: RV Water Backflow Preventer is equipped with a built-in check valve that effectively prevents backflow, maintaining clean water quality for long term use 【Easy Installation】: Hose Connector Connection Fill features a user friendly installation process suitable for various RV, making it convenient for everyday maintenance by users 【Widely Application】: RV water inlet replacement use for many trailer marine RV connection to city water hoses, keeps something dirt out of your water system Specification: Material: PP Brass silicone Size Chart: Diameter: 12cm/4.72inch Package Includes: 1 RV City Water Inlet Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.