Just came across this thread. I have the exact same issue. Not having taken apart my PB4SQ booster pump yet, not sure if I have more damage, but the housing is cracked (picture attached). Leslies website has the part listed, but out of stock. INYO same thing, notes out of stock for the season. Can’t seem to find it anywhere else.
If you come across the part, let me know
Some sites seem to sell the entire pump for $500ish. I got a quote from a local company that can do the install for $700ish (parts and labor, 2 year warranty). Maybe time to cap it off (loop it) and go robot. I’ve probably got a little time before the temps warm up, would just prefer to get my water moving sooner than later.
I have the same problem everyone else is having. Cracked faceplate (housing). Builder wanted to charge $700 to replace pump. I can do it myself but no parts available. So, question is, what is a Dolphin robot? Does it not use a booster pump?Your signature shows you have a Dolphin robot. Guess not if you are trying to fix a booster pump.
You could go back to a robot. Cleans better, less electricity.