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Introducing Cash Valve's Adjustable Back Pressure Relief Valve - the perfect solution for controlling back pressure in any plumbing system. Made from durable bronze, this valve is designed to handle pressures up to 1000 psi and has a generous flow rate of 4 GPM. Its adjustable spring-loaded diaphragm allows you to easily control the relief pressure, while its FNPT inlet and outlet connections make installation easy. Ideal for use in both residential and commercial applications, this valve is sure to provide reliable back pressure relief for years to come. Upgrade your plumbing system with Cash Valve's Adjustable Back Pressure Relief Valve - Made in the USA by a Veteran-Owned Business.