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I have a Moen shower faucet with a 1222 positemp cartridge. The handle adapter broke so I ordered a new unit but I didn't replace the cartridge since I was unable to remove it and I wasn't even able to put the cartridge clip back on since it was so tight. Several weeks after I replaced the handle adapter a big leak emerged below into the ceiling in the kitchen. It filled half a bucket in just a few minutes. the leak is right below the toilet but I know it is coming from the shower. I tried dropping water in the shower drain but no water leaked so I know it is when I turn on the shower. Could this leak be caused by the cartridge needing to be replaced or is it because the clip was not installed or could it be a bigger problem with the pipes?

  • Hello, and welcome to Stack Exchange. Without more information, the answer is almost certainly going to be "yes." – Daniel Griscom Mar 22 '18 at 12:27
  • Which question did you answer Yes? The cartridge needs to be replaced, the clip needs to be installed or is the problem with the pipes? – Patrick Barao Mar 23 '18 at 1:01
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    Could this leak be caused by the cartridge needing to be replaced or because the clip was not installed YES and YES. The parts that on these things really need to go back on or they will not function like they should. As I was told when working on Aircraft if you work on it and then put it back together and have parts left over, then you did not do the job correctly and most likely the aircraft will have problems; not good since they can't pull over in the sky. This is true for any maintenance function there is a reason these parts are installed on the component they need to be reinstalled. – Ken Mar 23 '18 at 7:31
  • @Ken is right: it could be either of these, or something else. We don't have enough information. – Daniel Griscom Mar 23 '18 at 11:39
  • My Moen kitchen faucet developed a leak in the cartridge. Replacing the cartridge did not fix the problem. Brands come and brands go. They develop a good rep, and then coast on it until quality gets bad enough that people notice. See Sunbeam mixers after the hostile takeover in the 90's. I'm not saying this is the case now with Moen, but it is something to consider when you get multiple "once in a million" defective replacement parts. The only cures are extensive engineering knowledge and a high quality 3D printer, or a different brand of faucet. – Wayfaring Stranger Jul 26 '18 at 20:28
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Could this leak be caused by the cartridge needing to be replaced or is it because the clip was not installed or could it be a bigger problem with the pipes?

It could be any of those, but I'd start by installing the cartridge clip.

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