Glow-worm
Glow-worm Electrode S202621
Spark electrode for Glow-worm Ultimate BF and Ultimate BF Sealed System gas boilers.
At a glance
- Part type: Spark electrode
- Also known as 1333629
Showing prices
£7.44
£6.20 ex. VAT · VAT at 20%
In stock
Order within 7m for same-day dispatch
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 Glow-worm S202621 is a spark electrode for Glow-worm Ultimate BF and Ultimate BF Sealed System gas boilers. It provides the ignition spark to light the burner. This electrode is a service part for maintaining reliable boiler ignition.
Signs this part needs replacing
- Boiler fails to ignite or locks out repeatedly
- No spark visible at the burner during ignition attempt
- Electrode tip is heavily carbonised or corroded
- Ceramic insulator is cracked or damaged
- Electrode gap is incorrect or the tip is worn
Before you order
- Confirm your boiler model is listed in the Fits section
- Check the existing electrode for cracks, carbon buildup or damage
- Ensure the boiler is isolated from gas and power before replacement
- Verify the part number S202621 matches your current electrode
Compliance
| GC number | 379-020 |
|---|---|
| Barcode / EAN | 5037985033445 |
| Alternative numbers | 1333629 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| GLOWWORM ULTIMATE 30 BF SEALED SYSTEM | 41-319-65 | 41-319-65 | — | — |
| GLOWWORM ULTIMATE 30BF | 41-319-51 | 41-319-51 | — | — |
| GLOWWORM ULTIMATE 40 BF SEALED SYSTEM | 41-319-66 | 41-319-66 | — | — |
| GLOWWORM ULTIMATE 40BF | 41-319-52 | 41-319-52 | — | — |
| GLOWWORM ULTIMATE 50 BF SEALED SYSTEM | 41-319-67 | 41-319-67 | — | — |
| GLOWWORM ULTIMATE 50BF | 41-319-53 | 41-319-53 | — | — |
| GLOWWORM ULTIMATE 60 BF SEALED SYSTEM | 41-319-68 | 41-319-68 | — | — |
| GLOWWORM ULTIMATE 60BF | 41-319-54 | 41-319-54 | — | — |
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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