How to Replace a Baxi Duo Tec 28 Ga Diverter (UK)
Fit a new diverter on the Baxi Duo Tec 28 Ga. UK part number, isolation and torque steps.
Baxi
Part number
The Baxi Duo Tec 28 Ga uses the diverter motor 720873101. Check the GC serial number sticker inside the case — Baxi revised the diverter at least once during production.
Isolate
Turn off the gas at the isolation cock. Switch off 230 V at the fused spur. Drain to just below the diverter: on the Baxi Duo Tec 28 Ga, the drain-off is on the return pipe.
Fit
Unclip the diverter. Transfer the O-rings if OEM includes new ones — always fit the new seals supplied. Torque any brass unions to 25 Nm. Refill to 1.2 bar, bleed and fire for a wet check.
Frequently asked questions
- OEM or compatible?
- For gas-carrying components on the Baxi Duo Tec 28 Ga always fit OEM. Non-gas parts (fans, PCBs, pumps) — OEM keeps the warranty valid.
- Do I need to re-commission?
- Yes — record combustion CO/CO₂ ratio after any gas-side work per BS 6798.
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