American Standard single handle shower faucet water hammer fix. Repair replace cartridge valve. Easy

Replacing a faulty 20 year old American Standard shower valve that had low pressure and flow with an intermittent knocking sound from hot water line. After removing the cartridge I found the problem was copper wire shavings (from upstream plumbing) was partially clogging the hot water inlet of the pressure balance unit inside. It might have been salvageable with a good cleaning alone.
The two main replacement parts used in this video are as follows:
1. Outside white piece which attaches to shower handle is American Standard Cartridge, Plastic/Ceramic (Model #023529-0070A).
2. Inside gray colored piece American Standard Pressure Balancing Unit for Single-Control Tub/Shower Valve (Model #M952100-0070A).
On further study, I looks like my existing outer cartridge was American Standard47 MM Back-to-Back Cartridge, Model# 952377-0070A. According to the American Standard website the only difference between the two is "the back to back cartridge is used when the hot and cold lines have been reversed. The 023529-0070A is the standard cartridge."

[@victordipersia]

Very well explained and documented video, I think it will help me to do the same job. Thank you.

[@loboazul001]

Your welcome Victor! Glad it was helpful!

[@victordipersia]

@@loboazul001 BTW i replaced the cartridge following your video which was very accurate. Thank you

[@hottoddy6757]

I all ready replaced the cartridge. No help. Vibrating pipes & low water pressure. For some reason my NEW Menards hot water heater drain valve has been leaking for 2 days. I have over 2 inches of water in my basement. I did a temporary fix till I get new water tank drain from Rheem. Now I have no cold & very weak hot water pressure in shower. What am I to do when I stand in water looking up & my neck decides to give the imaginary pain. Have to clear room where the access panel is & see what the hell is going on with no cold water.

[@luiscordero8958]

Do you know the part # of cover plate and handle , mine it’s in bad condition I replaced the cartridge but I need to change the rest I tried to order it from Amazon but the handle and plate are different please help