For XM & RK Pumps, up to 3650PSI

The Gymatic 3/B series of unloaders (built for the XM & RK Series of AR North America pumps, Max PSI 3,650) features a bolt on design with internal by-pass system. Adjustable pressure release in pump head when in by-pass, protecting from over pressurization. Eliminates by-pass hose and fittings. Built-in chemical injector available (see specifications for individual models for details). The molded plastic adjusting knob is designed for user comfort. Body is constructed of brass body with a stainless steel plunger and spring, by-pass is made from brass.
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