Jabsco ParMax HD4 Diaphragm Pump 1/2 Inch 24V – Q402J-115S-3A

The Jabsco Par‑Max HD4 is a heavy‑duty 24 V freshwater pressure pump ideal for boats, RVs, and motorhomes where reliable on‑demand water delivery is required. It’s well suited to supplying multiple outlets, including sinks and showers, in mobile freshwater systems.

Designed for automatic, smooth operation, this pressure‑controlled diaphragm pump delivers up to 15 L/min (4 GPM) open flow and has a max operating pressure and cut off of 40 PSI (2.8 bar). It features an integrated sealed pressure switch that starts and stops based on water demand. Constructed with a four‑chamber Santoprene diaphragm and EPDM check valves, it provides long‑lasting, quiet performance, while self‑priming and dry‑run capability allow flexible installation and tolerance of brief dry running. 1/2″ (13 mm) quick‑connect straight hosebarb ports with inline 40‑mesh strainer make plumbing simple, and vibration‑dampening mounting feet help reduce noise in operation.