Description
Worcester 8737709170 Diverter Valve – Genuine Refurbished Part
The Worcester 8737709170 diverter valve is a genuine refurbished component designed for a wide range of Worcester Greenstar boilers. This valve controls the direction of water flow inside the boiler, allowing the system to switch correctly between central heating and domestic hot water.
Each unit is professionally refurbished and tested to ensure reliable performance, making it a cost-effective alternative to buying new.
Compatible Worcester Boilers
Worcester Greenstar Life Series
Combi Boilers (C Models)
- GR8300IW 30C LPG – 47-800-23
- GR8300IW 30C NG – 47-800-18
- GR8300IW 35C LPG – 47-800-22
- GR8300IW 35C NG – 47-800-17
- GR8300IW 40C LPG – 47-800-21
- GR8300IW 40C NG – 47-800-16
- GR8300IW 45C LPG – 47-800-20
- GR8300IW 45C NG – 47-800-15
- GR8300IW 50C LPG – 47-800-19
- GR8300IW 50C NG – 47-800-14
Regular Boilers (R Models)
- GR8300IW 30R LPG – 41-800-04
- GR8300IW 30R NG – 41-406-98
- GR8300IW 35R LPG – 41-800-03
- GR8300IW 35R NG – 41-406-97
- GR8300IW 40R LPG – 41-800-02
- GR8300IW 40R NG – 41-406-96
- GR8300IW 45R LPG – 41-800-01
- GR8300IW 45R NG – 41-406-95
- GR8300IW 50R LPG – 41-406-99
- GR8300IW 50R NG – 41-406-94
System Boilers (S / P Models)
- GR8300IW 30S LPG – 41-406-93
- GR8300IW 30S NG – 41-406-91
- GR8300IW 35P LPG – 41-406-92
- GR8300IW 35P NG – 41-406-90
Worcester Greenstar 8000 Style Series
Combi Boilers (C Models)
- GR8700IW 30C LPG – 47-800-13
- GR8700IW 30C NG – 47-800-03
- GR8700IW 35C LPG – 47-800-12
- GR8700IW 35C NG – 47-800-02
- GR8700IW 40C LPG – 47-800-11
- GR8700IW 40C NG – 47-800-01
- GR8700IW 45C LPG – 47-800-10
- GR8700IW 45C NG – 47-406-99
- GR8700IW 50C LPG – 47-800-09
- GR8700IW 50C NG – 47-406-98
Combi Boilers (CB Models)
- GR8700IW 30CB LPG – 47-800-08
- GR8700IW 30CB NG – 47-406-97
- GR8700IW 35CB LPG – 47-800-07
- GR8700IW 35CB NG – 47-406-96
- GR8700IW 40CB LPG – 47-800-06
- GR8700IW 40CB NG – 47-406-95
- GR8700IW 45CB LPG – 47-800-05
- GR8700IW 45CB NG – 47-406-94
- GR8700IW 50CB LPG – 47-800-04
- GR8700IW 50CB NG – 47-406-93
System / Regular Boilers (P / S / SB Models)
- GR8700IW 30P LPG – 41-406-89
- GR8700IW 30P NG – 41-406-87
- GR8700IW 35S LPG – 41-406-88
- GR8700IW 35S NG – 41-406-86
- GR8700IW 30SB LPG – 41-406-85
- GR8700IW 30SB NG – 41-406-83
- GR8700IW 35SB LPG – 41-406-84
- GR8700IW 35SB NG – 41-406-82
Please note: Before placing your order you must check your part matches the Manufacturer Part Number stated above.
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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.
At the same time select the Saturday delivery option at checkout if you’d like your purchases delivered on a weekend day.
In a word thank you for choosing us!






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