Worcester Bosch
Worcester Bosch Pump UPM4L 68W ERP1 8737605865
Worcester Bosch UPM4L 68W ERP1 circulator pump assembly for Greenstar combi and system boilers.
At a glance
- Also known as 2248751
£275.48
£229.57 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 UPM4L 68W ERP1 is a circulator pump assembly used in Worcester Bosch Greenstar combi and system boilers. It moves heating water around the primary circuit, maintaining flow through the boiler and the radiators or heating circuit. The 68W ERP1 rating identifies the pump's energy performance band and power consumption.
Signs this part needs replacing
- Heating circuit fails to circulate, leaving radiators cold or slow to warm
- Boiler repeatedly overheats or locks out during a heating demand
- Pump runs noisily, grinds, or emits humming that does not clear after venting
- No pump activity detected while the boiler is calling for heat
- Water weeping from the pump body or its seals
Before you order
- Confirm the appliance model and GC number against the fit list above
- Check the existing pump is a UPM4L type rated at 68W
- Verify the Worcester Bosch part number 8737605865 matches the pump being removed
- Confirm whether the pump is supplied as a complete assembly before removing the old unit
Compliance
| Alternative numbers | 2248751 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR 2000 COMBI GR2301iW 25 C LPG | 47-800-35 | 47-800-35 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2301iW 25 C NG | 47-800-34 | 47-800-34 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2301iW 30 C LPG | 47-800-37 | 47-800-37 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2301iW 30 C NG | 47-800-36 | 47-800-36 | — | — |
| WORCESTER GREENSTAR 4000 SYSTEM GR4700iW 12 S LPG | 41-800-08 | 41-800-08 | — | — |
| WORCESTER GREENSTAR 4000 SYSTEM GR4700iW 12 S NG | 41-800-07 | 41-800-07 | — | — |
| WORCESTER GREENSTAR 4000 SYSTEM GR4700iW 15 S LPG | 41-800-10 | 41-800-10 | — | — |
| WORCESTER GREENSTAR 4000 SYSTEM GR4700iW 15 S NG | 41-800-09 | 41-800-09 | — | — |
| WORCESTER GREENSTAR 4000 SYSTEM GR4700iW 18 S LPG | 41-800-12 | 41-800-12 | — | — |
| WORCESTER GREENSTAR 4000 SYSTEM GR4700iW 18 S NG | 41-800-11 | 41-800-11 | — | — |
Showing 10 of 28 compatible appliances.
Documents & drawings
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