Maximum Flow 72 GPM' Off Point 3 Inches' On Point 9 1/2 Inches, Operation Automatic, Water Flow @ 15 Feet of Head 45 GPM' Water Flow @ 20 Feet of Head 25 GPM, Water Flow @ 5 Feet of Head 72 GPM, Shut Off 23 Feet, Maximum Solids 1/2 Inches, Top Cast Iron