Designed to protect your boats water system plumbing and fixtures from the possible high pressure of municipal water systems. Features: Reduces high water pressures (up to 100 psi) down to 35 psi. Built-in backflow preventer. Easy to install. Easy-to-clean in-line filter. Available in two models: a compact permanently installed flush mount model, or an in-line model with garden hose fittings (1010). Flush -White, Intake Port - 3/4" GHT, Dischg. Port - 1/2" IPT= (1000). In-Line, Intake Port - 3/4" GHT , Dischg. Port - 3/4" GHT= (1010). Flush -Chrome, Intake Port - 3/4" GHT, Dischg. Port - 1/2" IPT= (2000)