Glow-worm
Glow-worm Expansion Vessel 0020048250
Expansion vessel for the Glow-worm Energy 35 Store boiler, absorbing heating water expansion to maintain stable system pressure.
At a glance
- Appliance family: Energy 35 Store
- Also known as 1340719
£181.55
£151.29 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 Glow-worm expansion vessel (part 0020048250) is a sealed diaphragm vessel used on the Energy 35 Store boiler. It absorbs the volume increase of heating water as it heats, keeping system pressure within the operating range.
Signs this part needs replacing
- System pressure drops repeatedly and needs frequent topping up
- Boiler locks out or displays a low-pressure fault
- Water appears at the vessel valve when the charge is checked
- Pressure rises sharply once the boiler heats up
- Vessel feels heavy or sounds full of water when tapped
Before you order
- Confirm the boiler model and GC number from the appliance data badge
- Check the part number against the manufacturer's parts list for the Energy 35 Store
- Confirm the pressure loss is not caused by a leak elsewhere in the heating circuit
- Check the vessel charge pressure before fitting
Compliance
| Alternative numbers | 1340719 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| GLOWWORM ENERGY 35 STORE | — | — | — | |
| GLOWWORM ENERGY 35 STORE | 47-019-37 | 47-019-37 | — | — |
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.
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