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Water Safety & Flow Control


Pressure Relief Valves for Fire Protection Applications with Test Lever


1/2 in. (15mm)


Series FP53L Pressure Relief Valves for Fire Protection Applications are designed for use in fire protection grid systems to provide protection against excessive water pressure caused by thermal expansion or line surge. It consists of a bronze body construction with NPT threaded male inlet and NPT threaded female (drain) outlet connections, stainless steel spring, and test lever. Series FP53L is UL listed and has a standard 175psi (12.25 bar) pressure relief setting.

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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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