The Baxi 7812539 is a genuine OEM 3-way valve cartridge designed for use in the Baxi Combi 2 and LPG Combi 2 boiler ranges. This cartridge sits inside the diverter valve body and controls the flow of water between the domestic hot water (DHW) circuit and the central heating (CH) system.

When the cartridge becomes worn or blocked, symptoms may include: no hot water, radiators heating when taps run, fluctuating water temperature, or boiler error codes. Replacing it with this genuine Baxi component restores smooth switching and reliable boiler performance.

Key Features:

• Genuine Baxi 3-way (diverter) valve cartridge

• Controls CH/DHW water distribution

• Ensures smooth switching between heating and hot water

• Helps resolve hot/cold cycling, crossover heating & HW faults

• Built to Baxi’s strict OEM standards for reliability

• Durable mechanical construction

• Direct-fit replacement for quick, professional installation

Compatibility

The Baxi 7812539 3-Way Valve Cartridge is compatible with:

• Baxi Combi 2

• Baxi LPG Combi 2

• Any boiler listing 7812539 in its official parts documentation

Commonly used in:

• Baxi Combi 80e 2

• Baxi Combi 105e 2

• Variants of the Baxi LPG Combi 2 series

Installers should always double-check compatibility using the boiler’s service manual or parts list.