Worcester Bosch
Worcester Bosch Expansion Vessel 10 Litre 87154071760
Worcester Bosch 10 litre expansion vessel, part 87154071760, for Greenstar RSF Combi and ZWBR 11-25 A31 appliances; absorbs heating system water expansion.
At a glance
- Part type: Expansion vessel
- Also known as 1013093
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
£322.01
£268.34 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 87154071760 is a 10 litre expansion vessel used in Worcester Bosch Greenstar appliances. It is a sealed, pressurised diaphragm vessel that absorbs the volume increase of water as the heating circuit heats up, keeping system pressure within the range the boiler expects. A working vessel prevents the pressure relief valve from discharging every time the appliance fires and protects the rest of the sealed system from repeated pressure swings.
Signs this part needs replacing
- System pressure climbs quickly once the boiler fires and drops again as it cools.
- The pressure gauge sits high with no heating demand, or the boiler needs topping up regularly.
- Water is discharging from the pressure relief valve discharge pipe.
- The vessel feels heavy or sounds full of water when tapped, indicating a failed diaphragm.
- Pressure rises sharply during the first few minutes of a heating cycle and the appliance locks out on low pressure afterwards.
Before you order
- Check the GC number and model on the appliance data badge against the compatibility list before ordering.
- Confirm the connection size and mounting arrangement match the vessel being removed.
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Mechanical
| Part type | Expansion vessel |
|---|
Compliance
| Manufacturer part number (MPN) | 87154071760 |
|---|---|
| GC number | E27-192 |
| Barcode / EAN | 4010009538868 |
| Commodity code | 8403 90 00 00 |
| GPC classification | Household Boilers/Furnaces/Tank Water Heaters Replacement Parts/Accessories |
| Alternative numbers | 1013093 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR RSF COMBI NG | 47-311-44 | 47-311-44 | — | — |
| WORCESTER GREENSTAR ZWBR 11-25 A31 LPG | 47-311-45 | 47-311-45 | — | — |
| WORCESTER WORCESTER GREENSTAR RSF NATURAL GAS | — | — | — |
Documents & drawings
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