Worcester Bosch
Worcester Bosch Gas Cock 87174052750
Worcester Bosch 87174052750 gas cock isolation valve, GC H27-398, for Greenstar FS and Highflow appliances.
At a glance
- Part type: Isolation valve (gas cock)
- Also known as 1020059
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
£41.23
£34.36 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 87174052750 is a gas cock — an isolation valve fitted on the gas supply within the appliance. It lets the gas supply be shut off at the boiler for servicing, commissioning and maintenance work. It is a Worcester Bosch spare belonging to the Greenstar and Highflow appliance families.
Signs this part needs replacing
- A gas smell or a detectable leak traced to the cock while the appliance is running
- A stiff or seized spindle that will not turn by hand
- The valve no longer shuts the gas supply off fully when the appliance is isolated
- Weeping or staining around the gland or spindle
- Corrosion or debris build-up on the valve body or its connections
Before you order
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
- Check the appliance GC number and serial plate against the compatibility list to confirm the correct variant.
- Cross-reference alternative number 1020059 if the original number is not shown on the parts diagram.
- Have the appliance model and GC number to hand when checking the list below.
Mechanical
| Part type | Isolation valve (gas cock) |
|---|
Compliance
| Manufacturer part number (MPN) | 87174052750 |
|---|---|
| GC number | H27-398 |
| Barcode / EAN | 4010009719243 |
| GPC classification | Valves/Fittings - Water and Gas |
| Alternative numbers | 1020059 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR FS30 CDI REGULAR | 41-406-62 | 41-406-62 | — | — |
| WORCESTER GREENSTAR FS30 CDI REGULAR LPG | 41-406-63 | 41-406-63 | — | — |
| WORCESTER GREENSTAR FS42 CDI REGULAR | 41-406-64 | 41-406-64 | — | — |
| WORCESTER GREENSTAR FS42 CDI REGULAR LPG | 41-406-65 | 41-406-65 | — | — |
| WORCESTER GREENSTAR HIGHFLOW 440 | 47-311-82 | 47-311-82 | — | — |
| WORCESTER GREENSTAR HIGHFLOW 440CDI LPG | 47-406-26 | 47-406-26 | — | — |
| WORCESTER GREENSTAR HIGHFLOW 440CDI NG | 47-406-24 | 47-406-24 | — | — |
| WORCESTER GREENSTAR HIGHFLOW 440CDi ErP LPG (7738100590) | 47-406-86 | 47-406-86 | — | — |
| WORCESTER GREENSTAR HIGHFLOW 440CDi ErP NG (7738100589) | 47-406-85 | 47-406-85 | — | — |
| WORCESTER GREENSTAR HIGHFLOW 550CDI LPG | 47-406-25 | 47-406-25 | — | — |
Showing 10 of 14 compatible appliances.
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.
WORCESTER appliance manual — GREENSTAR FS30 CDI REGULAR (GC 41-406-62), GREENSTAR FS30 CDI REGULAR LPG (GC 41-406-63), GREENSTAR FS42 CDI REGULAR (GC 41-406-64), GREENSTAR FS42 CDI REGULAR LPG (GC 41-406-65)
manualmanualWORCESTER appliance manual — GREENSTAR HIGHFLOW 440 (GC 47-311-82)
manualmanualWORCESTER appliance manual — GREENSTAR HIGHFLOW 440CDI LPG (GC 47-406-26), GREENSTAR HIGHFLOW 440CDI NG (GC 47-406-24), GREENSTAR HIGHFLOW 550CDI LPG (GC 47-406-25), GREENSTAR HIGHFLOW 550CDI NG (GC 47-406-27)
manualmanualWORCESTER appliance manual — GREENSTAR HIGHFLOW 440CDi ErP LPG (7738100590) (GC 47-406-86), GREENSTAR HIGHFLOW 440CDi ErP NG (7738100589) (GC 47-406-85), GREENSTAR HIGHFLOW 550CDi ErP LPG (7738100592) (GC 47-406-88), GREENSTAR HIGHFLOW 550CDi ErP NG (7738100591) (GC 47-406-87)
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