Lockable Gravity Water Inlet Hatch

This RV water inlet hatch is designed specifically for gravity-fed water tank systems. It features an 85 mm (3.34 inch) cut-out diameter and overall dimensions of 12 x 12 x 9.2 cm, with a weight suited for standard caravan and trailer installations. Constructed from sturdy white plastic, it includes a built-in spring mechanism and integrated seal ring to prevent leaks and maintain secure closure over time. The 1/2-inch vent allows air to escape efficiently during filling, enabling faster and smoother tank refills. Includes two physical keys for reliable mechanical locking — ideal for shared or public-use sites where water security matters.