Worcester Bosch
Worcester Bosch Pump Para TSL 7M 8737604635
Worcester Bosch circulating pump, part 8737604635, for Greenstar combi boilers.
At a glance
- Also known as 1011142
£330.37
£275.31 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 PUMP PARA TSL 7M is a Worcester Bosch circulating pump, supplied under part number 8737604635. It moves heating water around the primary circuit of the appliance, maintaining flow through the boiler and the wider system. The catalogue listing identifies the unit as a Wilo pump.
Signs this part needs replacing
- The boiler runs but radiators stay cold or heat unevenly, with poor circulation at the pump body
- Pump noise — humming, grinding or rumbling — that continues after the appliance has been running a while
- The pump body is hot and running but the flow and return pipes show little temperature difference
- Repeated overheat or flow-related lockouts cleared by a reset that returns after a short period
- Visible leakage, staining or corrosion around the pump housing or its connections
Before you order
- Confirm the appliance model and GC number against the fitment list before ordering
- Check the pump body markings and part number on the unit being replaced match 8737604635
- Verify the fuel type of the installation — LPG and NG variants are listed separately
- Isolate the appliance electrically and isolate and drain the water circuit before removal
Compliance
| Alternative numbers | 1011142 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR 2000 COMBI GR2300iW 25 C LPG | 47-800-27 | 47-800-27 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2300iW 25 C NG | 47-800-26 | 47-800-26 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2300iW 30 C LPG | 47-800-29 | 47-800-29 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2300iW 30 C NG | 47-800-28 | 47-800-28 | — | — |
| WORCESTER GREENSTAR GR2300iW 25 C LPG COMBI | 47-800-27 | 47-800-27 | — | — |
| WORCESTER GREENSTAR GR2300iW 25 C NG COMBI | 47-800-26 | 47-800-26 | — | — |
| WORCESTER GREENSTAR GR2300iW 30 C LPG COMBI | 47-800-29 | 47-800-29 | — | — |
| WORCESTER GREENSTAR GR2300iW 30 C NG COMBI | 47-800-28 | 47-800-28 | — | — |
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.
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