Description
Worcester 87377046110 Diverter Valve Assembly
The Worcester 87377046110 Diverter Valve Assembly is a genuine Worcester Bosch replacement component designed for selected Greenstar and Heatslave II boilers.
The diverter valve directs heated water between the central heating circuit and domestic hot water system. A faulty diverter valve can lead to heating and hot water issues, poor performance, or incorrect switching between functions.
Replacing a worn or faulty diverter valve assembly helps restore reliable boiler operation and efficient water flow.
Compatible Boilers
Worcester Greenstar CDI Compact Series
- Greenstar 28 CDI Compact – GC No. 47-406-44
- Greenstar 28 CDI Compact LPG – GC No. 47-406-45
- Greenstar 32 CDI Compact – GC No. 47-406-46
- Greenstar 32 CDI Compact LPG – GC No. 47-406-47
- Greenstar 28 CDI Compact ERP – GC No. 47-406-77
- Greenstar 28 CDI Compact ERP LPG – GC No. 47-406-78
- Greenstar 32 CDI Compact ERP – GC No. 47-406-79
- Greenstar 32 CDI Compact ERP LPG – GC No. 47-406-80
- Greenstar 36 CDI Compact ERP – GC No. 47-406-81
- Greenstar 36 CDI Compact ERP LPG – GC No. 47-406-82
Worcester Greenstar i Series
- Greenstar 25i Combi ERP – GC No. 47-406-60
- Greenstar 25i Combi ERP LPG – GC No. 47-406-61
- Greenstar 30i Combi ERP – GC No. 47-406-62
- Greenstar 30i Combi ERP LPG – GC No. 47-406-63
Worcester Greenstar SI Compact Series
- Greenstar 25 SI Compact – GC No. 47-406-50
- Greenstar 25 SI Compact LPG – GC No. 47-406-51
- Greenstar 30 SI Compact NG – GC No. 47-406-52
- Greenstar 30 SI Compact LPG – GC No. 47-406-53
- Greenstar 25 SI Compact ERP – GC No. 47-406-73
- Greenstar 25 SI Compact ERP LPG – GC No. 47-406-74
- Greenstar 30 SI Compact ERP – GC No. 47-406-75
- Greenstar 30 SI Compact ERP LPG – GC No. 47-406-76
Worcester 400 / 500 Compact Series
- 533 Compact – GC No. 47-406-58
- 533 Compact ERP – GC No. 47-406-83
- 535 Compact – GC No. 47-406-59
- 535 Compact ERP – GC No. 47-406-84
Worcester Heatslave II Series
Compatible with selected Heatslave II 12/18, 18/25 and 25/32 models including ERP, ERP+, External and 2022 variants.
Please note: Before placing your order you must check your part matches the Manufacturer Part Number stated above.
For any Worcester Products related products please clink below link :Worcester Spares
For any Worcester Fans please clink below link :Worcester Fan
Worcester PCBs please clink below link :Worcester PCB
Worcester Pump please clink below link :Worcester Pump
    Prices: Please note all prices are inclusive of VAT.
At Heating and catering parts,
We certainly strive to provide the best possible customer experience. Consequently, we understand that sometimes a product may not meet your expectations or requirements. That is why we offer a comprehensive 30-day return policy to ensure your satisfaction. Please read our full Return Policy
We appreciate you buying from our store. Usually, If your order is received by 1:00 p.m. EST (Monday–Friday), we will ship the item the same day. You can count on us to deliver quickly and safely. In other words, we take pride in our prompt and trustworthy service and will do everything we can to ensure the safe arrival of your package.
Please note that weekends are not included in our next-day delivery guarantee. Delivery for orders placed on Fridays (the next day) is on the following Monday.






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