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The Watts FP53L-M1-225 1/2 is a 1/2" pressure relief valve for fire protection service, factory set at 225 psi. It is rated to 225 psi.
This 1/2 inch, 225 psi pressure relief valve is designed to relieve thermal expansion in fire protection systems. It features a lever for flushing and draining the system and a second lever to lock the valve closed for hydrostatic testing of the system. This relief valve is FM and UL listed.
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