Prevents internal vacuum conditions that could collapse storage tanks - especially copper. Bronze body with a male inlet, integral body seat and silicone seat disc. Maximum water pressure 200 psi. Maximum temperature 210°F (99°C). Capacity 13 SCFM at 2" Hg. Available with dust cover.
Designed to protect hot water supply systems and pressure vessels.
The VR-801 is design certified to ANSI Z21.22 / CSA 4.4
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