AR21039 Mini-Matic 4/B Unloader with Adjustable Injector

AR21039 Mini-Matic 4/B Unloader Valve with built-in chemical injector and brass bypass. Specifications: - Max Pressure: 2,600 PSI - Max Flow: 3 GPM (2.0-3.0 GPM range) - Max Temperature: 140°F - Inlet: 1/2" FPT - Outlet: 3/8" MPT - Injector: 2.0mm adjustable chemical injector Features: - Bolt-on design with internal bypass system - Brass body with stainless steel plunger and spring - Eliminates need for separate bypass hose and fitting - Pressure-actuated with smooth operation Compatible Pump Series: RC, RCA, RCMA, RCV, XM, XMA, XMV, XT, XTA, XTV. Replaces AR Combi-Set. Cross-Reference: 462246, 87125760, 8.712-576.0