WELLMATE PENTAIR WM6 WM-6 20 gallon quick connect + Brass tank tee install kit + brass ball and check Valves -Free standing Water Well PRESSURE TANK FSG2 SQUARE D 40 60 Factory pre-charged pressure: 38 PSI System connection: 1" NPT inlcudes 1" x 4" BRASS tank tee kit with brass ball and check valve Max. working pressure: 125 PSI Tank volume: 20 gallons