Hello. I am trouble shooting a Delta single handle shower problem. The shower has a diminished flow and over the past 6 months or so has become so hot that it appears that the cold water flow has been restricted or cut off. I think my solution is to replace the cartridge (I think Delta RP19805) assuming that it is stopped up with minerals or something. I have taken it out and replaced that springs and seals because it was also dripping, but the hot water (or lack of cold water) seems to have gotten worse. Any other ideas?

Delta faucets has life time warranty just call them at 800-345-3358 tell them that you have a leaking cartridge they will send you a new cartridge assembly P/N RP19804 free no charge to you, open the PDF file below for removal, instruction and adjusting the temperature. Good luck.

John

Afaroo, thanks for the info, I did not know that. I stopped by HD on the way home today and bought one. I have already installed it and it fixed the problem.

Thanks for the update, you still can call Delta and they will send you one for free, you can return that one or the one installed back to HD you will save at least $50, Thanks.

John