Jabsco Flush Mount Pressure Regulator This Jabsco pressure regulator protects your boats water system by regulating water pressure from 46-125 psi down to a safe 45 psi automatically. Whether connected to a dock-side main or a campground faucet, the Jabsco Regulator will maintain regulated output at low or high flow rates. Features a built-in backflow preventer and an easy cleaning strainer. Flush mount regulator mounts permanently in vessel super structure and easily replaces most original city