This 4.0 Horse Power Impeller, Bearing & Seal Kit that fits a 56 Frame Pump Wet Ends manufactured by Guangdong LX Brand only. See NOTES Below... This Kit consists of an Impeller, Bearing, Seal, Silicon and Seal Installation Tool. The pumps this impeller & seal Kit fits usually have the part number WUA-400, WP-400 or LP-400 on the label. Watch the video for instruction on how to install this part and also how to determine if this is the correct part. It is about 4 13/64"" across the face edge to edge, it measures about 3" from the tip of the front to the tip of the sleeve in the back, it also measures 7/16" from the inside of the vane edge to edge. Some of these impellers have a number on them B358-02 if yours does you must measure the overall width of the impeller to get the correct one. They cast one implore with that number on it and they trim the impeller down to the different horse powers so be sure you do measure edge to edge... The Bearing in this kit does fit the motor this pump is associated with. NOTE: This Wet End looks a lot like an Aqua-Flo and a CMP Wet End but they do not interchange see the video for how to tell the difference!
Posted by Greg B on Mar 22nd 2018
Thanks to the Spa Guy I was able to take apart my Chinese-made WUA 400-II spa pump and replace the seals and impeller, and put it back together within an hour. I watched his video twice to make sure that I did it right. Before ordering I called Hot Tub Parts of America, and he answered the phone and answered my questions. He told me that too much bromine probably contributed to the existing seals only lasting 3 years, and suggested using chlorine powder instead.
The motor shaft was damaged from a month or more of leaking seals, but enough of it was good that, with the new seal kit, I am back in business, and my wife thinks I'm a hero.
Posted by David on Sep 5th 2017
Glad you made a video on how to repair this pump! All the parts fit perfectly, it was easy. The hard part was placing the pump motor back under the tub!