Worcester Bosch
Worcester Bosch Valve 3-Way Saia Without Bypass 87186422110
Three-way Saia diverter valve without bypass for Worcester Bosch Greenstar 24 and 28 FSN-GB combi NG boilers, part 87186422110.
At a glance
- Also known as VALVE-3-WAY-SAIA-WO-BYPASS, 1031505
£124.20
£103.50 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 Worcester Bosch 87186422110 is a three-way diverter valve without bypass, built by Saia for Worcester Bosch. It sits in the hydraulic circuit of Greenstar combi boilers and switches water flow between the central heating circuit and the domestic hot water plate heat exchanger. It is listed under the diverter valve category for the Greenstar FSN-GB combi NG range.
Signs this part needs replacing
- No domestic hot water while the central heating continues to run normally
- Radiators warming when only hot water is drawn
- Boiler locking out or logging a diverter valve fault
- Lukewarm or intermittent hot water at the tap
- Valve head clicking or whirring without any change in flow
Before you order
- Confirm your boiler model against the fit list above
- Check whether the existing valve has a bypass — this version does not
- Inspect the valve head and motor for damage before ordering
- Read the part number from the existing valve body where it is still legible
Compliance
| GC number | J09-218 |
|---|---|
| Barcode / EAN | 4051516056803 |
| Alternative numbers | VALVE-3-WAY-SAIA-WO-BYPASS, 1031505 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR 24 FSN-GB COMBI NG | 47-406-32 | 47-406-32 | — | — |
| WORCESTER GREENSTAR 28 FSN-GB COMBI NG | 47-406-33 | 47-406-33 | — | — |
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.
No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
No technical questions yet for this part.
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