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Water Safety & Flow Control


LFN360, LFN360I

Lead Free* Vacuum Relief Valves

Lead Free* Models Available



1/2, 3/4 in. (15, 20mm)


For automatic venting of a closed system to atmosphere when a vacuum is created. The Watts LFN360 Vacuum Relief Valve permits air to enter and prevent vacuum conditions that could siphon the water from the system, resulting in collapse of a tank or water heater or equipment burn out. They consist of a Lead Free* brass body construction and a low profile design. Series LFN360, LFN360I can be mounted in a horizontal or vertical position and are tested and rated to ANSI Z21.22, and are CSA certified. Model LFN360 comes with 1/2 in. or 3/4 in. male NPT connection. Maximum Steam Working Pressure: 15psi (103 kPa).

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Disclaimer: Watts product dimensions in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

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*The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

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