How to Replace a Shower Diverter Valve (UK)
Fit a new diverter on bath-shower mixers. Bristan, Ideal Standard, Grohe part numbers.
BristanIdeal StandardGrohe
Types of diverter
Push-pull rod, lift lever, or 3-way rotary. Match the replacement to the body — the escutcheon and lever length are body-specific.
OEM part numbers
- Bristan bath-shower mixer diverter — DIVERTER-01.
- Grohe Grohtherm 2000 — 47651000.
- Ideal Standard Ceratherm — A960521NU.
Fit
Isolate hot/cold. Remove lever, then diverter cartridge with 22 mm socket. Fit with silicone grease.
Frequently asked questions
- Why does water flow from both the tap and shower at once?
- Failed diverter O-ring. Replace the whole cartridge — O-ring alone is unreliable.
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