Cash Acme 22398-0000LF Vr-801 Drill Vent 3/4-Inch Vacuum Relief Valve with Dust Cover, bronze-Fast Shipping

Description

DESIGNED TO: protect hot water supply systems and pressure vessels against negative pressure

APPLICATION: suited for many domestic and commercial systems

PREVENTS: internal vacuum conditions that could result in burned out heaters and/or collapsed storage tanks – especially copper

INSTALLATION: installed on the coldwater supply line, the VR-801 closes tightly under pressure and opens at a 1-inch mercury vacuum. Atmosphere admitted to the system breaks the vacuum, preventing collapse of the storage tank. It is recommended that the VR-801 be installed in am upright position