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Temperature & Pressure Relief Valves

Commercial
VR-801
VR-801

The VR-801 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. Installed on the cold water supply line, the Cash Acme VR-801 closes tightly under pressure and opens at a 1″ mercury vacuum. Atmosphere admitted to the system breaks the vacuum, preventing collapse of the storage tank.

Application: For protection of commercial hot water supply systems and pressure vessels against negative pressure
Approvals and Listings: ANSI Z21.22/CSA 4.4 Listed by CSA

Product Options

Size
Model
Lead Free
Standard Part #
Factory Setting
BIM
1/2"
VR-801 DRILLED VENT W/ DUST COVER
22397LF
n/a
3/4"
VR-801 DRILLED VENT W/ DUST COVER
22398LF
n/a
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