Worcester Bosch
Worcester Bosch Flow Limiter 8737713455
Flow limiter for Worcester Bosch Greenstar combi boilers, rated at 15 litres per minute.
At a glance
- Also known as 8905039
£11.21
£9.34 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 flow limiter (part number 8737713455) is a 15 litre per minute restrictor used in the water circuit of Worcester Bosch Greenstar combi boilers. It controls the maximum flow rate through the appliance, which keeps the delivered hot water temperature stable across the draw-off range. The component is a small inline restrictor fitted within the boiler's water path.
Signs this part needs replacing
- Domestic hot water flow rate noticeably higher than the appliance is designed to deliver
- Unstable or fluctuating hot water temperature at the taps
- Scale or debris build-up blocking or partially blocking the restrictor
- Reduced flow at outlets where the restrictor has become clogged
- Restrictor damaged or missing after previous service work
Before you order
- Confirm the appliance model and GC number match the fitment list before ordering
- Check the existing restrictor's flow rating, as more than one rate may be used across the range
- Inspect the water circuit for scale and debris, and clean or flush as required during fitting
- Verify the manufacturer part number 8737713455 against the boiler's parts listing
Compliance
| Alternative numbers | 8905039 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR 8000+ STYLE COMBI GR8701iW 40 C NG | 47-800-46 | 47-800-46 | — | — |
| WORCESTER GREENSTAR GR8701iW 40 C NG | — | — | — |
Documents & drawings
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No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
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