For XT & XM Pumps, up to 2600PSI
The Mini-Matic 4/B series of unloaders (built for the XT & XM Series of pumps from AR North America, Max PSI 2,600) features a bolt on design with internal by-pass system. Adjustable pressure release for pump head when in by-pass, protecting from over pressurization. Eliminates by-pass hose and fittings. Built-in chemical injector is available, see specifications of models for details. The molded plastic adjusting knob is designed for user comfort. The body is constructed of brass body with stainless steel plunger and spring, by-pass is made from aluminum or brass (check specifications of models for details).