1/2" Vacuum Relief Valve

The Eastman Vacuum Relief Valve is designed to protect 
hot water supply systems and pressure vessels against 
negative pressure. It is especially well suited for many 
domestic and commercial systems. It works by preventing 
internal vacuum conditions that could result in burned-out 
heaters and/or collapsed storage tanks – especially 
copper. 

Features

Installed on the cold water supply line, the valve closes 
tightly under pressure and opens at a 1" mercury 
vacuum. The atmosphere admitted to the system 
breaks the vacuum, preventing the collapse of the 
storage tank. It is recommended that the valve be 
installed in an upright position.