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?