Worcester Bosch
Worcester Bosch Hose (Siphon) 8737604739
Siphon hose from Worcester Bosch for Greenstar 1000 Series Gr1000W 30 C NG boilers.
At a glance
- Also known as 1038503
£11.30
£9.42 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
This is the siphon hose listed by Worcester Bosch under part number 8737604739. It forms part of the condensate disposal path on Greenstar 1000 Series boilers, carrying condensate from the siphon through to the drain point. It is a serviceable component, so it can be renewed if the existing hose becomes blocked, split or hardened.
Signs this part needs replacing
- Condensate leaking from the hose or from the joints at either end
- Water pooling around the siphon or beneath the boiler
- The hose has hardened, cracked or perished with age
- Gurgling or slow drainage from the condensate trap
- The bore is restricted or blocked by debris and scale
Before you order
- Confirm the boiler model matches one of the fitments listed above
- Check the existing hose part number against 8737604739
- Inspect the siphon body and connections for damage before fitting a new hose
Compliance
| Alternative numbers | 1038503 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR 1000 SERIES GR1000W 30 C NG | 47-800-39 | 47-800-39 | — | — |
| WORCESTER GREENSTAR GR1000W 30 C NG | — | — | — |
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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