Grohe Wax Thermo-Element — 00798000
The Grohe 00798000 is an authentic, original-equipment 3/4" wax thermo-element designed specifically for Grohe thermostatic bath and shower mixer valves. As the core temperature-sensing mechanism inside compatible 3/4" cartridges and heavy-duty valves, this expansion capsule expands and contracts to blend incoming hot and cold supplies to your selected temperature. If your shower is running lukewarm, failing to blend, delivering uncontrollable scalding or cold water, or failing to hold a steady 38°C setting, replacing this element restores original factory temperature regulation.
Identification Guide:
MPN: 00798000 (also referenced as 00 798 000) | EAN / Barcode: 4005176008160 | Component: 3/4" Wax Thermo-Element (Wax Capsule) | Material: Precision Machined Brass & Copper Expansion Core
Key Features
- Precision Temperature Control: Premium wax expansion fill reacts rapidly to pressure and temperature changes to prevent scalding and cold shocks.
- Solves Mixing Failures: Cures common faults where the shower will not get hot, delivers erratic spikes, or stays at one fixed temperature.
- Direct Internal Core Replacement: Allows servicing of the core thermo-element in compatible 3/4" valves without replacing complete outer bodies.
- Genuine Grohe Quality: Factory OEM tolerances guarantee reliable seating, calibration accuracy, and long-term durability.
Installation Note
Ensure hot and cold water supplies are fully isolated before dismantling the valve. Carefully extract the cartridge core assembly and remove the existing wax capsule. Check the internal chamber and non-return valves for limescale buildup, cleaning where necessary with a gentle descaler. Apply a light coating of WRAS-approved silicone grease to any accompanying O-rings before reassembly. Once water supplies are restored, always recalibrate the 38°C temperature stop using a digital thermometer.
Confirmed Model Compatibility
Fits classic and modern Grohe 3/4" thermostatic mixer valves and cartridges, including:
- Grohe Cartridges & Sub-Assemblies: Used inside 3/4" thermostatic cartridge assemblies 47012000, 47111000, 47186000, and 47310000.
- Grohtherm Automatic / Automatic 2000 (3/4"): 34357000, 34650000, 34953000, 34954000, 34347000, and 34348000.
- Grohtherm 3000 (3/4"): Selected 3/4" high-flow concealed and exposed models (such as 34367000 and 19685000).
- Grohe Concealed Thermostat Bodies: 34214000 (3/4" Concealed Body) and legacy Grohmix 3/4" thermostatic units.
- Please note: This element is for 3/4" valves. It is not compatible with standard 1/2" compact cartridges (such as 47439000), which use the smaller 00797000 element.