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The Watts 0556031 LFN36M1 is a 3/4" service vacuum relief valve. This low-profile vacuum relief valve is constructed with a lead-free brass body and NPT male inlet connection, complete with a protective cap. It automatically allows air to enter the piping system, preventing vacuum conditions that could siphon water and damage equipment. It is suitable for low pressure steam and water service.
The Watts vacuum relief valve is ideal for use in domestic water heaters, supply tanks, steam kettles, and low-pressure steam systems.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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