Locking RV Tank Inlet with Vent System

This inlet replaces standard non-secured caps on RV freshwater tanks relying on gravity feed. Measuring 12 x 12 x 9.2 cm with an 85 mm (3.34 inch) mounting diameter, it installs directly into existing cut-outs. Manufactured from dense white plastic resistant to impact and UV degradation. Its defining feature is the dual-function design: a 1/2-inch vent passage ensures air escapes smoothly during filling, and a keyed lock (supplied with two keys) secures the hatch against accidental or unauthorised opening. A compression spring applies steady load to a resilient seal ring, guaranteeing watertight closure even after hundreds of cycles — verified through repeated field use in varied weather conditions.