Sime
Sime Air Separator 6215905
Air separator for Sime Super FOUR gas boilers, part number 6215905.
At a glance
- Also known as 2040804
Showing prices
£176.78
£147.32 ex. VAT · VAT at 20%
Available to order · 3 working days
Available to order · 3 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Sime 6215905 is an air separator for Sime Super FOUR gas boilers. It removes trapped air from the heating circuit to help maintain water flow and reduce system noise. The part sits within the auto air vent category of gas boiler spares.
Signs this part needs replacing
- Persistent air in the heating system, requiring frequent radiator bleeding
- Gurgling, bubbling or rushing noises from the boiler or pipework
- Cold spots at the top of radiators despite bleeding
- Boiler kettling or overheating linked to trapped air
- Uneven heat distribution or reduced heating performance
Before you order
- Confirm your boiler is a Sime Super FOUR or Super FOUR Revised model.
- Check the GC number on your appliance against 47-719-04 where applicable.
- Verify part number 6215905 against the manufacturer's parts list for your boiler.
- Inspect the existing air separator for blockages or damage before ordering.
Compliance
| Alternative numbers | 2040804 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| SIME SIME SUPER FOUR | — | — | — | |
| SIME SIME SUPER FOUR REVISED | — | — | — | |
| SIME SUPER FOUR - 8091605 | 47-719-04 | 47-719-04 | — | — |
| SIME SUPER FOUR REVISED - 8091607 | 47-719-04 | 47-719-04 | — | — |
Fitment listings are a guide, not a guarantee. Plant-room assemblies get modified on site more often than not. Send us the GC number off the data badge and a photo of the existing valve and we will confirm before anything is dispatched.
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.
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