I'm trying to replace my diverter stem valve (water leaks from tub when shower is on and recently cold water drops out randomly depending on position of diverter) but I can't seem to get it off. I believe it is a union brass unit as I replaced the cold water stem valve a month ago. I have removed the handle and cover plate and can see the stem. There is only one nut visible but it is slightly stripped and after cleaning it off with CLR it almost looks like it is one piece to the piece behind it? I have several socket wrenches I have used but it keeps slipping and I've tried a monkey wrench with no luck. The stem looks to be D-shaped with 14 splines. Looking at union brass replacement parts I either see D shaped or 18 spline so not sure exactly what piece I'm looking at.

Any advice on how to get this out? This is my first time replacing a diverter. Is it similar to a cold/hot water stem valve where I should just be able to loosen that nut and the whole stem should come out?

I'm not sure how to show an image but I'll try to include one as I'm sure it will help

Thanks in advance.
Gregg

obviously the valve was made to be taken apart should it need fixing but it is difficult to give exact advice without a photo. but if you have stripped the hex nut you are in trouble.

Here are some pics.





The red arrow is where I'm trying to turn it without luck. I assume this is the point it will unscrew from and not further back?

Thanks,
Gregg

you will need a 6 point socket

NOT a 12 point

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

When the nut is so rounded that even a six point socket will not engage properly, a "damaged nut socket" will frequently work.

a set of these will do it..
you are turning the correct part.

Thanks. I'll give it another shot. Appreciate the guidance.

Gregg



Edited 1 times.

I was able to get the nut off using the correct socket wrench. Now I don't see what else there is to do. The stem and piece it is attached to is larger than the threads for that nut, so I can't just pull it out



Same question again... am I missing something? I assumed I would be able to just pop out the stem at this point...

Thanks,
Gregg

Update: Got it out. Had to unscrew stem pretty hard with pliers but then it came out. Now on mission to find matching part.

Thanks,
Gregg