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Author:
kingshakabobo (IL)
A couple years ago we installed two grohe 34 124 thermostatic valves. One in my place and one in the condo neighbor's place. They are both serviced by the same 3/4 inch supply lines.
My tempature is OK at, or just past, the "safety" button. The neighbor's has always needed to be turned full hot past the safety and all the way bottomed out. Even then, it's not hot enough for her now tennants occupying the unit.
Before I look at it for her I wanted to get a few ideas what to look for.
Here is what comes to mind:
1.) I don't remember if the valve had an internal (behind the wall) setting for temp?
2.) Is it possible one of the service stops is not turned on all the way?
3.) Maybe the hot side of a cartridge is clogged (is that posssible?)?
Keep in mind, common supply lines and common hot water heater. The lines run through her unit and up to mine.
Any ideas?
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Author:
waukeshaplumbing (WI)
those grohe valves are sure screwy how they handle temp limits
who ever installed them sets where the handle stops and the button needs to be pushed...i typically do it by feel (the manufacturer says use a thermometer)...i try to max out the temp right at the button...that way it doesnt need to be pushed...
id take it apart and advance the limiter....get a schematic and do it yourself
there could be debris in the cartridge and there could be a stop not opened all the way, but more than likely it just needs adjustment
do you have galvanized water pipes or a lot of sediment in your lines?
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Author:
kingshakabobo (IL)
Copper but we do get some sediment. Especially when the water is shut off and on. Whenever I do some work on mine and shut the water off, I usually get a call from a neighbor wondering why their kitchen faucet is clogged.
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Author:
kingshakabobo (IL)
Are you saying there is an internal limiter? Or is it just the setting on the outside/button?
[www.groheamerica.com]
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Author:
waukeshaplumbing (WI)
you internally set where the button 'point' is...you turn the valve's temp up
i mix up Grohe and HansGrohe, and who knows which model you actually have
get the install directions off the internet for your valve and it will explain.
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Author:
packy
you need to take the trim off down to about number 1 on this view.
after removing the circular clip that number 1 is pointing to, remove the white dial with the temperature numbers on it. you will see a green plastic cap with a cross slot in it. loosen that cap about a turn to turn and a half. put everything together and the temperature will be warmer.
your handle 1.1 and 1.2 may be different..
if you have the directions that came with the trim the pictures will be about the same as this but it will be more specific to your valve.
if you decide to hire a plumber, make sure to tell them it is a grohe thermostatic valve that needs adjusting. if they have never seen one before, they will be lost.
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Author:
LemonPlumber (FL)
You remove the handle you set the brass toward the colder end and you re install the trim /handle.so simple even an insurance profile could do it!!!I prefer to set the handle to the cold and then move 1 eight turn further toward the cold side, re installing the handle at just the position it was removed at.Test the hot with the handle re installed.Never loose the cold end.where function should always produce cold /cooler temps as used.a new cart may be needed where hot at 105 and above will not see 65 at the low end.see the manufacturer where range failure seems to be problematic.
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Author:
packy
lemon, if he has the type handle as i pictured, the dial with the numbers on it must be removed to access the adjustment piece.
the dial with the numbers on it wil only fit onto the piece beneath it in one direction.
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Author:
LemonPlumber (FL)
Packy the brass of all grohe models controls the set/range delivered.the pieces before you get to the brass are/varied and often many.As long as you do not screw up the hot and cold side install the change is/at the brass stem.don't ask me why I am dead sure.Buck eighty six for across over cart was still cheaper than the tile or finishers price to cross the tubing as missed.I have grown to love the 5/8" they leave as the finished to tile area. valve buried 3 "deep in a 2x4 wall.
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