20 Most Recent Grohe Grohtemp 3/4 inch thermostat rough-in valve 34902000 Questions & Answers

The drain pipe may not have been installed correctly - the slope may be wrong, or the pipe may be too small, or you may have too much backpressure, or if you have a septic tank it may be full and need pumping, or any number of other possible problems. You might have another plumber come for an assessment and opinion - make it clear that you don't necessarily intend to hire them to do any WORK, you just want their opinion. Then they won't try to sell you all new plumbing to replace what you just bought...

Grohe Plumbing | Answered on Sep 03, 2020

use an articulated wrench

Grohe Plumbing | Answered on May 09, 2019

There is a set screw (blue) behind a removable plug (yellow).

Grohe Plumbing | Answered on Mar 27, 2019

Corrosion/hard water scale has built up between the slotted shaft and the handle .... "cementing" it in place.
A faucet handle puller may help depending on your design. This video shows how for a 2 faucet sink setup...but your 1 faucet handle should be similar. The puller will ONLY work though if you can access the end of the slotted shaft to get leverage from. Can you remove an end cap from the handle to access the shaft? ...
If the puller will not work ....
You could try penetrating oil (if you can get the oil to the corrosion) ... or if your handle is metal, cover it with a wash cloth to prevent marring and tap with a brad hammer. Sometimes that breaks the corrosion bond.
You could also try heat/cold/heat/cold by heating with a hair dryer followed by a bag of ice water and then repeat. The temperature cycling might help.
In a real pinch ... but you have to VERY careful ... use a pry bar between the escutcheon plate and the handle...go slow .... use cloth protection to prevent marring ... move the pry bar around and rock it....say at 12, 3, 6, 9 o'clock positions around the handle
AND .... when you are successful ... when you reinstall ... put some silicon plumbing grease on the shaft to prevent future corrosion!

Grohe Plumbing | Answered on Feb 06, 2019

google this you might find the answer or ask jeeves

Grohe Plumbing | Answered on Nov 20, 2018

You usually can un-screw the hand sprayer, hold on to the hose! If there is more water coming out of the hose then you might have a plugged screen right inside the removed end or the total head is filled with hard water minerals. CLR at Walmart does desolve scale.with out hurting parts.

Grohe Plumbing | Answered on Nov 14, 2018

Try to soak the head in white vinegar. Pull the head out and dangle in a glass full of vinegar overnite.

Grohe Plumbing | Answered on Oct 07, 2018

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