Cash Acme pressure regulating valves are designed to reduce incoming water pressure to a safe pressure to protect plumbing components. They also helps to prevent pressure surges from entering the household from the main line. High pressure can cause damage to appliances and plumbing. A pressure regulator should be installed after the main line to help protect plumbing. The Cash Acme EB-45 is a half-cartridge based pressure reducing and regulating valve with a lead free bronze body. The valve resembles traditional regulators with a spring chamber and an adjusting screw but offers the high performance of a cartridge based valve. The Valve is fitted with FNPT x MPT or Union threading for easy installation.