SEA TECH (0121265 Lead Free Water Pressure Regulator with Gauge WATTS - WATER PRESSURE REGULATOR - Takes the worry out of replenishing your water tank by automatically turning the water off when pressure reaches 40 lbs. 3/4 inch NH hose connection Gauged version adjusts from 0 to 60 lbs. These valves are especially designed for units with self-contained water supply tanks The valve will also supply water automatically as needed to the tank for overnight or semi-permanent stays, saving wear and tear on the pump or compressor Adjustable pressure; and can be easily disassembled for cleaning Water Pressure Regulator With Gauge, Lead Free