My thanks to all for the advice. As it turned out, I also needed a new check valve but neither Rule nor Jabsco stocked replacement parts for my old 98A unit. So I purchased and installed an entirely new 98B unit. Everything is working just fine now. The problem is solved.
I've heard that bar soap is eventually trouble.
My thanks to all for the advice. As it turned out, I also needed a new check valve but neither Rule nor Jabsco stocked replacement parts for my old 98A unit. So I purchased and installed an entirely new 98B unit. Everything is working just fine now. The problem is solved.
I have been using this the past year and has been working great.
https://www.amazon.com/s?k=shower+s...3&sprefix=shower+schroom,aps,263&ref=nb_sb_ss