*Trapped Pressure Control Set Unloader with Chemical Injector *Inlet=3/8" FNPT *Outlet=3/8" MNPT *2.2 mm chemical injector *Max Pressure=1600 PSI *Flow Rate 2-3 GPM *Max Temp=165° F *Direct mount used on General Pump TT551, TT561, TT741, TT751, TT901, TT931, T9051, TT9061, TT9071, TS1021