I have a single handle moen tub faucet, it started to leak when water was running from a different faucet. I replaced the cartridge & about 2 months later it did it again, so I replaced the cartridge again, now about 3 weeks later it is doing it again. Any ideas on the problem?

Thanks
Ken

I have a single handle moen tub faucet that started leaking when another faucet was being used, so I replaced the cartridge, about 1month later it started leaking again, now 3 weeks later it is doing again.
Any ideas what going on?

Hi ktaphoius and welcome to The Plumbing Page at AMHD.com. You're responding to a 7 year old dead threads so I gave you one of your own. Please check the date before you post. Thanks
When you had the cartridge out did you turn the water back on for a few seconds to flush out the supplies and valve body? Back to you. Tom

Yes I did, I also stuck my finger in there to make sure I didn't feel anything

What's your house water pressure ? Set pressure to 55psi and see if the problem continues. Back to you. Milo

What's your house water pressure ? Set pressure to 55psi and see if the problem continues. Back to you. Milo

Not sure. I do have well water & the water pressure actually seems pretty low, definitely not as high as city water.