401488 Hoffman 1/2″ F x 3/4″ M NPT Main Water Vent

The Hoffman 1/2″ F x 3/4″ M NPT Main Water Vent Model 79 Part No. 401488 Water Main Vent Valve For use on hot or cold or glycol water mains and process applications with specific gravity greater than 0.7 Tapped at top for 1⁄8″ NPT safety drain connection for discharging moisture Removable top Built-in Check Valve 1/2″ NPT female and 3⁄4″ NPT male straight shank Maximum operating pressure 75 psig (5.2 bar)* Maximum hydrostatic pressure 200 psig (13.8 bar) Maximum temperature 250˚F (121˚C)