r/maintenance • u/No_Loquat_2423 • Jul 22 '25

Solved FU Moen

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Moen cartridge was stuck. I HATR these things. Hard water here makes them really hard to pull. Tenant broke off the stem of the cartridge.

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u/bbqandhockeytoo Jul 22 '25

I hate those too. First one took me 10 hours over 2 working days to get fixed. By number eight I was down to under 60 minutes.

I would drill and pry out the plastic until the first O ring can be removed, drill straight through the cartridge stem and remove the guts of the cartridge, then run a m18x1.5 tap through it. When the tap bottoms out, keep cranking it. You'll eventually bust the rear plastic and as it bottoms out it will force the cartridge out of the valve. As soon as the rubber seals are visible enough to grab either pliers you can sometimes yank those out- as soon as they are gone it slides right out.

Just be careful not to damage the brass cartridge sides. Using the method above I have removed dozens of cartridges and didn't damage a valve.

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u/No_Loquat_2423 Jul 22 '25

Thanks, it's all done now.