Grohtherm 1/2 Thermostatic Rough-in Valve
- Paraffin cartridge
- 1/2" NPT male connections
- Built-in check valves
- Service stops
- Temperature control only
- GROHE TurboStat® Technology
- Separate volume control required
- Requires Twin Ell for shower/tub combinations with diverter tub spout
- Back-to-back installation possible by reversing the cartridge - No additional parts required
- Fits all GROHE (non-integrated) thermostat trims
9 gpm at 45 PSI
- ASME/ANSI A112.18.1M
- ASSE Standard 1016
- CSA Standard B125.1-05
This rough in valve replaces the Grohe 34 122
Additional Grohe Links
Our SKU: 34 331
This product is listed under the following manufacturer number(s):
*Denotes a finish or option that has been discontinued
3 Questions from the Community
A diverter valve cannot be used as a substitute for a volume control. You will need to use whatever volume control trim that matches the trim that you will be using for the Grohe 34 331 thermostatic valve.
Is it possible to use the Grohe 5 port diverter 29 035 as a volume control for the Grohe 34 331 or do I need another part?
A. A diverter valve cannot be used as a substitute for a volume control. You will need to use whatever volume control trim that matches the trim that you will be using for the Grohe 34 331 thermostatic valve.
It is your 29 358 volume control that controls the amount of water that comes out as to the pressure you can always look into a booster pump.
We have very little water pressure and need help knowing which part controls pressure. We have 34.122 valve, 29.358 vol control, 28.528 body massage 28.179 hand held & 28.179 spray
A. It is your 29 358 volume control that controls the amount of water that comes out as to the pressure you can always look into a booster pump.
The Grohe 34 331 will not work with the 18 026. You have to use a thermostatic valve trim.
Is it possible to use the Grohe 18 026 Handles intended for sinks on this valve? (If the answer is no, are you _sure_ it's not possible?) Thanks!
A. The Grohe 34 331 will not work with the 18 026. You have to use a thermostatic valve trim.
Grohe Grohtherm Collection
Other Products In The Grohe Grohtherm Collection
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GROHE provides the following warranties on its products to the original purchaser, installed in a residential application. This warranty is effective for all faucets sold after January 1, 1997.
A Limited Lifetime Warranty is provided on all mechanical parts to be free from manufacturing defects in materials and workmanship under normal use for as long as the original purchaser owns their home.
General Finish WarrantyTM
A Limited Lifetime Warranty is provided on all GROHE product finishes to the original purchaser against manufacturing defects in materials and workmanship. At its option, GROHE will repair or replace any part or finish that proves to be defective in material and/or workmanship under normal installation, use and service.
To obtain warranty repair or replacement the faulty part or product is to be sent along with proof-of-purchase (original sales receipt) from the original consumer purchaser to:
- GROHE America, Inc.
241 Covington Drive
Bloomingdale, IL 60108
This warranty is extended to the original consumer owner, but does not cover installation or any other labor charges and shall not apply to any products or parts of products which have been:
- Repaired by unqualified persons or not using original GROHE spare parts or altered in any manner unless previously authorized in writing by GROHE; or
- Damaged as a result of misuse, negligence, accident or faulty installation or maintenance; or
- Installed or used in a manner contrary to GROHE's printed instructions; or
- Damaged by the effects of dirt, limescale or aggressive cleaners.
This warranty excludes all industrial, commercial, and business usage whose purchasers are extended a one (1) year limited warranty from the date of purchase, with all other terms of this warranty. (See following for commercial products.)
GROHE warrants its products installed in a commercial application to be free from manufacturing defects for a period of one (1) year from the date of acquisition by original owner. Replaced products or parts are warranted only for the period remaining under the initial warranty.
This warranty is limited solely to the above and this warranty and any warranties implied by state law will apply only for the applicable warranty period specified herein. Also, GROHE will not be liable for any loss, damage, expense or incidental or consequential damages of any kind, whether based on warranty, contract or negligence and arising in connection with the sale, use or repair of the product. Some states do not allow the exclusion or limitation of consequential damage or limitations on how long an implied warranty lasts, so the above limitations or exclusions may not apply. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. Unless otherwise contrary to state law governing the purchase, GROHE's liability will not exceed the contract price for the product claimed to be defective or unsuitable.