Grohe 0835500M T01 Shutoff Stop Valve for Grohmix Valve - Pair

Summary

GROHE 0835500M Shut-Off Stop Valve Pair for Grohmix Thermostatic Shower Mixers

The GROHE 0835500M is a pair of internal shut-off stop valves for the Grohmix thermostatic mixers and THM concealed valve body listed below. These screw-in, piston-type assemblies fit within the mixer body beside the central thermostatic cartridge and incorporate strainers.

The stop valves form part of the mixer's on/off mechanism, shutting off water flow when the control is turned off. They are separate from the thermostatic cartridge, which regulates temperature, and from the inlet service stops used to isolate the supplies. Replacing faulty stop valves addresses the shut-off mechanism rather than the temperature-regulating element.

Technical Details

Confirmed Models

• GROHE 34422000 Grohmix 1/2 Inch Mixing Valve Components, also referenced as 34422
• GROHE 34 422 and 34 422G Grohmix Concealed Thermostatic Shower Mixer Components
• GROHE 34951 Concealed Body for THM Thermostat Mixer 1/2 Inch Components
• GROHE 34434 / 34 434 Grohmix
• GROHE 34436 / 34 436 Grohmix
• GROHE 34458 / 34 458 Grohmix

Shut-Off Faults

Symptom: water continues to drip or run from the shower head or spout after the control is turned off. Likely Cause: worn or faulty internal stop valves can prevent complete shut-off. Solution: inspect the stop valves and strainers, then replace defective components. On Grohmix 34434, 34436 and 34458, 0835500M is the stop-valve pair used for this repair. Temperature-control problems require separate diagnosis.

Before Ordering and Installation

Check the exact mixer model and compare the original stop-valve assemblies before ordering. The Grohmix name alone does not establish fitment. This item is the stop-valve pair, not a complete mixer, thermostatic cartridge or operating handle.

Isolate both hot and cold water supplies before dismantling the valve. Inspect and clean the strainers, and follow the servicing procedure for the exact mixer model. After reassembly, check for leaks and confirm that the control shuts off the water fully. If the thermostatic cartridge is also serviced, readjust the temperature setting as required by the mixer instructions.

Related Spares You May Need

The two thermostatic cartridges below are alternative options for separate temperature-control repairs. They are not replacements for the 0835500M stop valves and are not both required together.

• GR-47111000 Thermostatic Cartridge for GROHE 47111000 - an aftermarket temperature-regulating cartridge for the specified Grohmix applications
• 47111000-CP Thermostatic Cartridge for GROHE 47111000 - an alternative aftermarket thermostat listing; check the stated model applications before selecting between the two options
• GROHE 08350000 Temperature Control Handle - for Grohmix 34434 within the models listed above; not for 34436, which uses 47298000
• TACSIL 3g Silicone Grease - TAC86 - an optional seal-servicing consumable, for use where permitted by the valve servicing instructions

For help identifying the correct component, send your mixer model details and clear photographs of the valve and original parts to our part identification service.