Goal: To fix the hot water streaming when it's in the off position without spending too much.
Investigation: After much googling and youtubing, it seems like the shower cartridge needs to be replaced. This is rather interesting because my wife and I paid someone to replace this part for us when we first moved in two years ago. At the time the hot water wasn't working in the same tub that needs attention now. We got the part for free from Moen because it has a lifetime warranty. It took about a week for it to arrive, after which we paid a labor cost for someone to install it for us.
This time we can't really wait a week because we have a stream of very hot water just flowing. After youtubing a bit, taking apart the shower handle, and unsuccessfully pulling the cartridge out, I gave up trying to take the part with me to Home Depot and just asked my wife if she had the email from 2 years ago with the part number, because that's all I really needed. But since I wasn't successful taking the cartridge out, I noted to myself that I may need to buy the Moen Cartridge Removal Tool, however another youtube video mentioned that the new cartridge will come with a small white plastic removal tool too. My wife forwarded me the email she saved from 2 years ago and I headed to Home Depot showing that I needed a Moen 1222b cartridge.
I went to the bath isle, but it was just all sinks and etc... not small parts. So I asked a rep and he pointed me to the plumbing isle. It took a little bit of time, but I located a Moen 1222 part (couldn't find 1222b) and the Removal Tool then did self checkout. I noticed in the 1222 packaging that there was the small white plastic removal part I saw in one of the YouTube videos, but I figured I would buy the Removal Tool now just in case I needed it.
I was able to just use the small white plastic removal tool that came with the new cartridge to move the old cartridge, but it did require more effort and force than seen in any of the videos I watched online. After confirming that everything worked, I reinstalled everything back and now need to head to Home Depot to return the separate Moen Cartridge Removal Tool. My wife and I talked about possibly returning the "defective" cartridge too since Moen has a lifetime warranty and it would save me another trip after Moen sent us another Moen 1222 cartridge. I told her, I don't know but I can ask.
After getting to Home Depot, I told the cashier that I wanted to return the Removal Tool and that I also wanted to return the "defective" Moen cartridge that I had already replaced. She asked her manager... so I had to re-explain that Moen has a lifttime warranty on this part and it was an emergency so I can't wait days for Moen to send me the part and that this part is defective and would make my life easier if Home Depot could RMA the part for me after refunding me. Manage initially suggested that I call Moen for the part and could return the part that they sent me. I said I could, but then what happens when the SKUs don't match? The manager finally agreed and said they could RMA the part and gave me a full refund. I told her, "Thank you for understanding my logic".
Conclusion: So after everything was said and done, I was able to fix my leaky hot water problem for no costs for parts... just labor, gas, and time.
This DIY video is from Moen.
This DIY video shows how to remove the cartridge with the small white plastic removal tool that comes with a new cartridge