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The VR-801 Vacuum relief Valve prevents internal vacuum conditions that could collapse storage tanks - especially copper. |Opens quickly in emergency situations|Opens on less than 1" mercury vacuum| Bronze body with a male inlet, integral body seat and silicone seat disc|Maximum water pressure 200 psi; Maximum steam pressure 15 psi; Maximum temperature 210�F (121�C)|Capacity 13 SCFM at 2" mercury|Designed to protect hot water supply systems and pressure vessels|Approvals: The VR-801 is certified to ANSI Z21.22 and listed by CSA.
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