Rotary Vane Pump, Body Material Low Lead Brass, Inlet/Outlet 3/8 In. FNPT, Min. Flow (GPM) 2.3, Max. Flow (GPM) 2.3, Relief Pressure Max. (PSI) 240, Max. Pressure (PSI) 290, External Relief No, By-Pass Yes, Carbonator Mounting, Max. Temp. (F) 158 Degrees , Vane Material Graphite, Stainless Steel Shaft