Glow-worm
Glow-worm Expansion Vessel 2L 05737800
A 2-litre domestic expansion vessel for Glow-worm Energy 35 Store and Saunier Duval Isomax F28E boilers.
£126.98
£105.82 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 EXPANSION VESSEL 2L - DOMESTIC is a 2-litre expansion vessel manufactured by Glow-worm. It absorbs the expansion of heated water within a sealed heating system, helping to keep system pressure stable through the heating cycle. It is listed for use on the Glow-worm Energy 35 Store and the Saunier Duval Isomax F28E.
Signs this part needs replacing
- System pressure climbs sharply as the boiler heats up and drops again once it cools
- The filling loop is used regularly to bring pressure back up to the correct level
- Water is discharged from the pressure relief valve during normal operation
- Corrosion or water weeping is visible around the vessel or its connection
- The pressure gauge swings widely between heating and standby cycles
Before you order
- Confirm the appliance model matches one of the listings above
- Check the capacity and connection arrangement of the vessel currently fitted
- Cross-check the part number 05737800 against the boiler's documentation or data plate
- Consider access to the vessel's mounting position before starting the work
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| GLOWWORM ENERGY 35 STORE | — | — | — | |
| GLOWWORM ENERGY 35 STORE | 47-019-37 | 47-019-37 | — | — |
| GLOWWORM GLOWWORM XTRAMAX | — | — | — | |
| GLOWWORM XTRAMAX | 47-047-15 | 47-047-15 | — | — |
| GLOWWORM XTRAMAX HE | 47-047-29 | 47-047-29 | — | — |
| SAUNIER DUVAL SAUNIER DUVAL ISOMAX F28E | — | — | — |
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.
No technical questions yet for this part.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.