Yesterday, I also repaired a leaking bath/shower cartridge in a Moen Posi-temp faucet (mod. 1222). I couldn't locate a Moen cartridge so I bought one in Home Depot made by Danco (#88675A). My priority was to correct the water leak. Today I noted that when the commode fill valve shuts off, a noise (clicking) comes from the tub that I suspected as water hammering. I tried flushing the water lines to correct for air hammer several times without success.
So that brings me to this site and I see that someone else has experienced the same problem. To correct the noise, I'll need to get a Moen cartridge. Until then, my question is: IS THERE ANY HARM DONE by leaving the Danco cartridge in place?
I can get accustomed to the metalic/hammering noise whenever the toilet is flushed and the tub faucet is shut off.
I'm not aware of any problems with non moen replacement parts being the cause for a water hammer problem. Start with the simplest and cheapest correction which is using a moen replacement cartridge. If the water hammer persists then you may have to install a water hammer arrester in the plumbing system. This is basically a shock absorber in the plumbing system to stop the effect of water hammer. An arrester will cost you around $10 to $15 at your local plumbing supply shop. If you are not comfortable soldering copper then you will want to hire a licensed plumber to complete the work for you.
I had the same type of problem with an older toilet in my house. It developed a water hammer when it shut off after filling the tank. I replaced the fill valve with a generic universal replacement for about $10 and it stopped. Again sometimes the simplest fix will work. Let me know how it works out.
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After replacing the Ace Hardware cartridge (manufactured by Danco, according to Ace) with a Moen cartridge, the problem was resolved. The cartridges are functionally equivalent when "on", but there's a difference when they're "off". Both have some type of a little mobile shuttle that presumably balances the water temperature while "on". You can blow air alternately into the hot and cold supply openings and force the shuttle to move, and hear the little knock when it hits its limit. In the "off" position, you can still blow air into the Ace cartridge, if only for an instant, and hear the knock. For the Moen cartridge, the supply openings are completely closed off in the "off" position. I suspect that the water hammer arresting capability in my plumbing isn't perfect, so when the mini shock waves caused by turning off other faucets hit the Ace cartridge when it's in its "off" position, the shuttle dances around a little causing the knocking sound.
I'm by no means a plumbing expert (although I was proud of my Moen vs. Danco "shuttle analysis"), but I suspect that using the Danco cartridge won't cause any harm. By the way, I tried really hard to get Danco to confirm or deny the validity of my findings, but nothing came of it despite the very friendly customer service representative with whom I was in contact.
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