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I bought a house and the home inspector missed this about the spare bathtub: when you turn on the cold water, water leaks out of the stem of the hot water faucet (and vice versa). I figure the o rings need replacement (or maybe packing). I finally got the faucet handles removed (screws were seized) and I see this odd shaped nut. It seems to be attached to the valve--if I try to unscrew it, the water comes on. The plastic chromed shroud prevents me from seeing anything. So, do I simply turn off the water supply, and unscrew this all the way? In other words, will it remove the valve stem? Or will the valve "bottom out" and then I can remove this nut?

It's a three handle tub fixture from Kohler, maybe the original one (house built around 1965). I'm skittish because both bathrooms share the same pipe so if something goes wrong, I lose the ability to shower.

UPDATE: I found the part number of that piece: it's a Kohler 41240-CP Insert Sub-Assembly. Amazon has it (with picture): Kohler 41240. The only difference is that has a washer under the nut (mine lacks it). Someone on Amazon actually asked how to remove it and the answer was to use a faucet puller. Is this true? The hole is a 1/2 inch deeper than the rod on my faucet puller and that flimsy chromed plastic couldn't take much stress. I did manage to find installation instructions for a Kohler Flair 3 handle faucet and the diagrams look like my faucet. I will need to pull that insert off. I'll try to extend my faucet puller with a nail and duct tape. I'll let everyone know how it turns out.

Thanks for looking.

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  • The ring against the tub wall should unscrew - it's likely only cosmetic. And the cylinder just behind the "odd" nut maybe also. Can you hold the nut with a wrench and twist off the cylinder and/or ring? – mike65535 Jul 24 '18 at 12:00
  • Yes, the ring against the tub might unscrew. But, I need to get that cover off first. I posted another picture to show it better. That cover spins freely, so once the nut comes off, it should just slide off. Thanks. – AdirondackJim Jul 24 '18 at 20:03
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I called Kohler support. They told me "it just pulls off". I was disappointed with that--nothing after 5 years "just pulls off".

I ended up tapping the hole. It's just the right size for a 1/4-20 tap. I then used a bolt to pull the inserts off--just screw the bolt in until it hits the valve stem and it pulls it off. I'm enclosing a picture of the inside of that insert so others can see what this is.

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