Sime
Sime DHW Expansion Vessel 6245106
2 litre domestic hot water expansion vessel for Sime Dewy HE 30/50 WM and Planet Dewy 30/50BF MET boilers, part 6245106.
At a glance
- Also known as 2042018
£129.66
£108.05 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 Sime 6245106 is a 2 litre domestic hot water (DHW) expansion vessel used in Sime gas boilers. It absorbs the expansion of heated domestic water within the DHW circuit, limiting pressure rise and reducing stress on components such as the pressure relief valve. It is listed for the Sime Dewy HE 30/50 WM and Planet Dewy 30/50BF MET models.
Signs this part needs replacing
- Boiler pressure drops repeatedly with no visible leak on the system
- Water discharging from the pressure relief valve when domestic hot water is heated
- Pressure gauge rises sharply when a hot water tap is opened
- Water weeping from the vessel connection or nearby valve
- Vessel feels heavy or waterlogged when checked, indicating diaphragm failure
Before you order
- Confirm your appliance model against the fit list above
- Check the existing vessel is marked as 2 litre
- Confirm the part number 6245106 against the existing component or the manufacturer's parts list
Compliance
| Alternative numbers | 2042018 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| SIME DEWY HE 30/50 WM - 3830011 | 47-719-23 | 47-719-23 | — | — |
| SIME PLANET DEWY 30/50BF MET - 8102700 | — | — | — | |
| SIME SIME DEWY HE 30/50 WM | — | — | — |
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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