Spa Hot Tub Pump Wet End 56Fr fits Guangdong LX Pumps 2" 4HP WUA Video How To LX Series Jet Pump 4HP Wet End Fits WUA LP and Guangdong LX Pump 2" x 2" Inlet and Outlet that measures 3" across the threads.. See our You Tube Video about this Pump "LX Series Guangdong Pump How To Repair The Spa Guy" 56fr is 5 7/8" center to center on the X bolt pattern