- Outlet Hole Design: The hatch lock for the water filling tank uses an outlet hole design to prevent vacuum buildup during filling, enabling smooth and easy water addition. - Dust Protection: The water fill lid includes a dust protection design, is easy to clean, and helps prevent dust and other foreign objects from entering the water tank. - Gravitational Water Filling Cap: The RV gravity water filler lid is made of PP material; strong and wear‑resistant, not easy to break, and with a long service life. - Easy to Install: The water filling port is quick to install, saving time and effort. It can be used with a variety of vehicle models such as motorhomes, motorhomes, trailers, caravans, etc. 2-3 use scenarios: - On camping trips, fill the RV water tank quickly without vacuum issues, improving refilling efficiency. - In dusty or gravel road environments, the dust protection design helps keep the water tank clean with minimal maintenance. - During RV maintenance or replacements, the easy installation supports quick upgrades across motorhomes, caravans, and trailers.