Hot Tub Spa Gate Slice Valve 2" Street X 2" Slip & 2" Pump Union Video How To 2" Threaded Female Pump Side which measures about 3" edge to edge.. 2" Slip Gzueable Side accepts a 2" pipe that measures about 2 3/8" OD.. Search our help video on YouTube "Hot Tub Part 2" Slice Valve with 2" Pump Union Spa Information How To" Fits Most Spa 2" Wet Ends where the threads measure about 3" across..