Alpha
Alpha Diverter Valve Assembly CD C/X 3.015562
Alpha diverter valve assembly 3.015562 for CD C and CD X combi boilers, switching water flow between the heating and domestic hot water circuits.
At a glance
- Part type: Diverter valve and hydraulics
- Appliance family: Alpha CD C and CD X combi boilers
- Also known as 1257771
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
£162.65
£135.54 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Alpha diverter valve assembly is a hydraulic component found in combi boilers, where it controls whether heated water is sent to the central heating circuit or to the domestic hot water circuit. On a demand for hot water the valve moves to divert flow away from the radiators and through the plate heat exchanger; when the tap closes it returns flow to the heating system. This assembly is built for the Alpha CD C and CD X combi boiler families.
Signs this part needs replacing
- Radiators warm up when only a hot tap is running
- Hot water runs but the heating circuit stays cold
- Domestic hot water temperature fluctuates or runs cold during use
- Water weeping from the valve body, spindle or connections
- The valve fails to move between the heating and hot water positions
Before you order
- Check the GC number on the appliance data badge against the compatibility list to confirm the correct variant for your boiler.
- Confirm the number on the existing valve matches 3.015562 or one of the alternative numbers listed.
- Inspect the seals and gaskets when the valve is removed and replace any that are worn.
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Mechanical
| Part type | Diverter valve and hydraulics |
|---|---|
| Appliance family | Alpha CD C and CD X combi boilers |
Compliance
| Manufacturer part number (MPN) | 3.015562 |
|---|---|
| Barcode / EAN | 8015065382406 |
| GPC classification | Household Boilers/Furnaces/Tank Water Heaters Replacement Parts/Accessories |
| Alternative numbers | DIVERTER-VALVE---CD25C-28C-35C, DIVERTER-VALVE-ASSY, 1257771 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ALPHA ALPHA CD28C EXTRA | — | — | — | |
| ALPHA ALPHA CD28C EXTRA LPG | — | — | — | |
| ALPHA ALPHA CD35C | — | — | — | |
| ALPHA ALPHA CD35C LPG | — | — | — | |
| ALPHA CD25C | 47-532-31 | 47-532-31 | — | — |
| ALPHA CD25C (LPG) | 47-532-32 | 47-532-32 | — | — |
| ALPHA CD25X | 47-532-39 | 47-532-39 | — | — |
| ALPHA CD25X (LPG) | 47-532-40 | 47-532-40 | — | — |
| ALPHA CD28C | 47-532-33 | 47-532-33 | — | — |
| ALPHA CD28C (LPG) | 47-532-34 | 47-532-34 | — | — |
Showing 10 of 20 compatible appliances.
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
ALPHA appliance manual — CD25C (GC 47-532-31), CD25C (LPG) (GC 47-532-32), CD28C (GC 47-532-33), CD28C (LPG) (GC 47-532-34), CD28C EXTRA, CD28C EXTRA (LPG), CD35C (GC 47-532-35), CD35C (LPG) (GC 47-532-36)
manualmanualALPHA appliance manual — CD25X (GC 47-532-39), CD25X (LPG) (GC 47-532-40), CD28X (GC 47-532-37), CD28X (LPG) (GC 47-532-38)
manualmanualALPHA appliance manual — HE25 (GC 47-532-41), HE25 (LPG) (GC 47-532-42), HE33 (GC 47-532-43), HE33 (LPG) (GC 47-532-44)
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