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Author:
herrtodd (CA)
Sorry for a trivial question - but for the life of me I cannot figure out how to get the handle and outer housing off of this Grohe 34 122 valve. Does anyone have a suggestion?
My goal here is to be able adjust the temperature stops, which I have been able to read about elsewhere. I have the exploded diagram from the 34 122, but not the diagram for the trim pieces.
Thanks!
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Author:
steve (CA)
Have you tried unscrewing the center cap from the handle?
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Author:
packy (MA)
yeah, remove the white cap by unscrewing it. there is a brass screw below it.
the rest of the pieces just pull towards you.
also there is a clip in there somewhere
also the part with the numbers on it has ears that you depress.
the green cylinder is what you adjust
take pictures as you go along.
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Author:
herrtodd (CA)
Thank you both for the pointer to unscrew the end cap -- I can't believe I missed it. The outer sleeve took a bit of doing to get off as well and only came off after I ran the fixture for a bit (but that may be coincidence.)
Now it appears I have a problem that can't be solved just by fiddling with the green cylinder.
The warmest I was able to get the water was about 105, but then when I rotated the cylinder through the 70-110 range of the temperature indicator, the low temp was about 104. I tried to find a sweet spot that gave me more of a temp range, but it doesn't appear that is possible. At this point the cylinder is screwed in just far enough so that the temperature indicator ring will fit over it.
My water heater is at 137, because I couldn't get a hot shower with it at 120. I need to set it back down to 120 and see what the warmest I can get it with that input temp, but that will have to wait for the weekend. I don't want to risk a cold morning shower before work.
Any suggestions on a next step here so that I can get a more full temp range? or at least up to 110?
Looking at this thread: [www.plbg.com] I'm guessing I need to figure out how to pull out the check valve and clean it. Or am I just going to need to figure out how to get a replacement cartridge (and figure out how to replace it)?
Thanks again for your help!
Edited 2 times.
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Author:
packy (MA)
that is an expensive cartridge. if you call grohe tech support, they may send you one for free.
i have never tried to clean one of those by soaking it in white vinegar overnight. i just haul one out and replace it.
usually when you lose the ability to adjust the temperature it means a new cartridge is needed.
it does look like someone removed the check valve for cleaning because i see teflon tape on the threads of the cap it is behind.
the chrome sleeve will pull towards you so can get deeper inside if you want/need to.
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