Sime
Sime O-Ring 121 6226429
Sime O-ring 121, part number 6226429, for Sime gas boilers from serial number 3307069087.
At a glance
- Also known as O-RING-121, 2040950
Showing prices
£0.54
£0.45 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 O-ring 121 is a sealing component for Sime gas boilers. It is listed for use from serial number 3307069087. It sits within the O-rings, washers and gaskets category of gas boiler spares.
Signs this part needs replacing
- Visible cracking, splitting or perishing of the O-ring
- Hardening or flattening of the seal
- Water or gas weeping from the sealed joint
- Persistent pressure loss around the affected connection
- Scale or debris preventing the O-ring from sealing correctly
Before you order
- Confirm the boiler model appears in the Fits list.
- Check the appliance serial number is 3307069087 or later, as stated for this O-ring.
- Match the part number 6226429 to the component being replaced.
- Inspect the replacement O-ring for damage before fitting.
Compliance
| Alternative numbers | O-RING-121, 2040950 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| SIME DEWY ZIP BF 25 SOLAR MET - 8101215 | — | — | — | |
| SIME DEWY ZIP BF 30 SOLAR MET - 8101216 | — | — | — | |
| SIME ECOMFORT 25HE | 47-283-06 | 47-283-06 | — | — |
| SIME ECOMFORT 30HE | 47-719-25 | 47-719-25 | — | — |
| SIME ECOMFORT 35HE | 47-283-09 | 47-283-09 | — | — |
| SIME ECOMFORT PLUS 25HE - 8104012 | 47-283-13 | 47-283-13 | — | — |
| SIME ECOMFORT PLUS 30 HE - 8104011 | 47-283-14 | 47-283-14 | — | — |
| SIME FORMAT 100C - 8098456 | 47-719-13 | 47-719-13 | — | — |
| SIME FORMAT 100C LPG - 8098455 | 47-719-13 | 47-719-13 | — | — |
| SIME FORMAT 110C | 47-719-21 | 47-719-21 | — | — |
Showing 10 of 82 compatible appliances.
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.
manual
SIME appliance manual — ECOMFORT 25HE (GC 47-283-06), ECOMFORT 30HE (GC 47-719-25), ECOMFORT 35HE (GC 47-283-09)
manualmanualSIME appliance manual — ECOMFORT PLUS 25HE - 8104012 (GC 47-283-13), ECOMFORT PLUS 30 HE - 8104011 (GC 47-283-14)
manualmanualSIME appliance manual — FORMAT 100C - 8098456 (GC 47-719-13), FORMAT 100C LPG - 8098455 (GC 47-719-13), FORMAT 110C (GC 47-719-21), FORMAT 80C - 8098454 (GC 47-719-12), FORMAT 80C LPG - 8098459 (GC 47-719-12)
manualmanualSIME appliance manual — FORMAT 30 HE - 8101206 (GC 47-719-22)
manualmanualSIME appliance manual — FORMAT SYSTEM 25 HE - 8101250 (GC 41-719-17)
manualmanualSIME appliance manual — PLANET DEWY 60 BFR - 8093575 (GC 41-283-03), PLANET DEWY 60 BFR - 8093577 (GC 41-283-03)
manualmanualSIME appliance manual — SUPERIOR 40 MKII - 8098100 (GC 41-719-10), SUPERIOR 50 MKII - 8098101 (GC 41-719-11), SUPERIOR 60 MKII - 8098102 (GC 41-719-12), SUPERIOR 75 MKII - 8098103 (GC 41-719-13), SUPERIOR 90 MKII - 8098104 (GC 41-719-14)
manualmanualSIME appliance manual — SUPERIOR 40CI - 8098110 (GC 41-719-10), SUPERIOR 50CI - 8098111 (GC 47-719-11), SUPERIOR 60CI - 8098112 (GC 47-719-12), SUPERIOR 80CI - 8098113 (GC 47-719-13)
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