I think that I have a long way to go! I shall be out of town for three days. I spent most of the day getting things done before I leave and doing various odds and ends. I shall have to get back to you for more suggestions when I come back.

I think you are right that the hot water supply is probably clogged! Right now, I do not know how to dismantle the hot water supply!

Thanks and I shall get back soon!

Milo I am back to the Shower Valve!

The Hot / Cold supply are indeed crudded up. I took the control screws out and sprayed some diluted vinegar solution in the two holes and left them to clean. I think to do a better cleaning job, I need to get inside the supply holes.

There seems to be four philips screws around the main mixing valve stem. Do I need to take them out to get into the supply valve holes? The Mixing valve parts are now all well cleaned and nicely fits back in the valve stem.

Milo, I have got it sort of working OK now. Wish I could have cleaned the H and C water supply valve by taking them out, but I just flushed them as well I could.

Thanks for all your good help.

Grohe Gromix 34 434

Here are some info that I got from Gorhe that I think would be useful to you and other readers!

http://docs.google.com/Doc?id=dch4vg...tr=EmailImport

http://docs.google.com/gview?a=v&pid...tion%2Fpdf

http://docs.google.com/gview?a=v&pid...lication%2Fpdf

Your problem is indeed in the stops. I have three of these valves and have cleaned them about every 5-10 yrs or so. I just finished one this evening and can assist you. Busy now, but I'll try to remember to come back and post more. For now, you want to remove that plate held by the 4 phillips screws and the two slotted cover/plugs over the stops. Then use a deep socket (I forget the size) to remove the two stops. (Turn off the shutoffs first). You will then see that the stops have a fine screnn that gets crudded up. Soak the stops in vinegar for 1+ hr (I used heated white vinigar) and clean carefully with a brush. Replace and celebrate.

Hello Sky_ tech you responded to an old post, Thanks.

John