Water Pressure Regulator - Flush Mount - White. Easy to install, easy-clean in-line filter, permanently installed flush mount model and in-line model with brass garden hose fittings that connect dockside water entry and garden hose water hook-up. Reduce high water pressures (up to 100 psi down to 35 psi).. Features:. Built-in back flow preventer. Easy-to-install. Easy clean in-line filter