Worcester Bosch
Worcester Bosch Diverter Valve 3-Way 87172044440
Worcester Bosch 3-way diverter valve 87172044440 for Greenstar Highflow combi boilers, directing water between heating and hot water circuits.
At a glance
- Part type: Diverter valves and hydraulics
- Also known as 1019937
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
£81.62
£68.02 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 87172044440 is a three-way diverter valve used in the Greenstar boiler range. It is a directional water device: in a combi boiler it routes heated water either into the central heating circuit or into the domestic hot water circuit, depending on which demand is active. The valve is supplied as a single unit and sits within the hydraulics group of the appliance.
Signs this part needs replacing
- Hot water runs cold or intermittent while the central heating continues to work normally
- Radiators heat up when only a hot water tap is opened
- No heating output when the hot water circuit is idle
- The boiler locks out or reports a diverter or hydraulics related fault
- Scale, sludge or debris visible around the valve body or its ports
Before you order
- Check the GC number and rating plate on the appliance to confirm the model before ordering.
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
- Inspect the existing seals and gaskets at the valve joints and replace them if they are compressed or damaged.
- The alternative number 1019937 may appear on older documentation for the same valve.
Mechanical
| Part type | Diverter & Motorised Valves |
|---|
Compliance
| Manufacturer part number (MPN) | 87172044440 |
|---|---|
| GC number | 47-311-82 |
| Barcode / EAN | 4010009719205 |
| GPC classification | Household Boilers/Furnaces/Tank Water Heaters Replacement Parts/Accessories |
| Alternative numbers | 1019937 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR HIGHFLOW 440 | 47-311-82 | 47-311-82 | — | — |
| WORCESTER WORCESTER GREENSTAR HIGHFLOW 440 RSF NATURAL GAS | — | — | — |
Documents & drawings
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