Main
Main Sight Glass 7683433
Mica sight glass, part 7683433, for Main and Potterton gas boilers.
At a glance
- Part type: mica sight glass
- Also known as 1121601
Showing prices
£8.16
£6.80 ex. VAT · VAT at 20%
Available to order · 1 working day
Available to order · 1 working day
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 Main 7683433 is a mica sight glass used on Main and Potterton gas boilers. It forms the viewing window into the combustion chamber, allowing the flame to be inspected during servicing and commissioning. The mica disc is specified for the heat exposure at the viewing point.
Signs this part needs replacing
- The mica disc is cracked, crazed or discoloured
- The flame is difficult to see clearly through the sight glass
- Soot or staining is visible around the viewing point
- The sight glass no longer sits or seals correctly in its housing
Before you order
- Check the boiler model against the fit list above
- Confirm the GC number on the appliance data badge matches your model
- Inspect the existing sight glass for damage before ordering
Compliance
| Barcode / EAN | 5039177602064 |
|---|---|
| Alternative numbers | 1121601 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| MAIN MAIN HEATING ONLY 12 HE | 41-474-02 | 41-474-02 | — | — |
| MAIN MAIN HEATING ONLY 15 HE | 41-474-03 | 41-474-03 | — | — |
| MAIN MAIN HEATING ONLY 18 HE | 41-474-04 | 41-474-04 | — | — |
| MAIN MAIN HEATING ONLY 24 HE | 41-474-05 | 41-474-05 | — | — |
| MAIN MAIN HEATING ONLY 9 HE | 41-474-01 | 41-474-01 | — | — |
| POTTERTON KINGFISHER MF CF100 | 41-589-12 | 41-589-12 | — | — |
| POTTERTON KINGFISHER MF CF40 | 41-589-02 | 41-589-02 | — | — |
| POTTERTON KINGFISHER MF CF50 | 41-589-03 | 41-589-03 | — | — |
| POTTERTON KINGFISHER MF CF60 | 41-589-04 | 41-589-04 | — | — |
| POTTERTON KINGFISHER MF CF70 | 41-589-09 | 41-589-09 | — | — |
Showing 10 of 60 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
MAIN appliance manual — MAIN HEATING ONLY 12 HE (GC 41-474-02), MAIN HEATING ONLY 15 HE (GC 41-474-03), MAIN HEATING ONLY 18 HE (GC 41-474-04), MAIN HEATING ONLY 24 HE (GC 41-474-05), MAIN HEATING ONLY 9 HE (GC 41-474-01)
manualmanualPOTTERTON appliance manual — KINGFISHER MF CF100 (GC 41-589-12), KINGFISHER MF CF40 (GC 41-589-02), KINGFISHER MF CF50 (GC 41-589-03), KINGFISHER MF CF60 (GC 41-589-04), KINGFISHER MF CF70 (GC 41-589-09), KINGFISHER MF CF80 (GC 41-589-10), KINGFISHER MF CF90 (GC 41-589-11)
manualmanualPOTTERTON appliance manual — KINGFISHER MF CFL100 (GC 41-590-34), KINGFISHER MF CFL40 (GC 41-590-27), KINGFISHER MF CFL50 (GC 41-590-28), KINGFISHER MF CFL60 (GC 41-590-29), KINGFISHER MF CFL70 (GC 41-590-30), KINGFISHER MF CFL80 (GC 41-590-31), KINGFISHER MF CFL90 (GC 41-590-32), KINGFISHER MF RSL100 (GC 41-590-41), KINGFISHER MF RSL50 (GC 41-590-36), KINGFISHER MF RSL60 (GC 41-590-37), KINGFISHER MF RSL70 (GC 41-590-38), KINGFISHER MF RSL80 (GC 41-590-39), KINGFISHER MF RSL90 (GC 41-590-40)
manualmanualPOTTERTON appliance manual — KINGFISHER MF RS100 (GC 41-589-01), KINGFISHER MF RS40 (GC 41-593-88), KINGFISHER MF RS50 (GC 41-393-95), KINGFISHER MF RS60 (GC 41-393-96), KINGFISHER MF RS70 (GC 41-393-97), KINGFISHER MF RS80 (GC 41-393-98), KINGFISHER MF RS90 (GC 41-393-99)
manualmanualPOTTERTON appliance manual — PERFORMA HE 12 SL (GC 41-592-06), PERFORMA HE 15 SL (GC 41-592-07), PERFORMA HE 18 SL (GC 41-592-08), PERFORMA HE 21 SL (GC 41-592-09), PERFORMA HE 24 SL (GC 41-592-10), PERFORMA HE 9 SL (GC 41-592-05)
manualmanualPOTTERTON appliance manual — SUPRIMA 100 (GC 41-607-82)
manualmanualPOTTERTON appliance manual — SUPRIMA 100 L (GC 41-590-48), SUPRIMA 120 L (GC 41-590-49), SUPRIMA 40 L (GC 41-590-43), SUPRIMA 50 L (GC 41-590-44), SUPRIMA 60 L (GC 41-590-45), SUPRIMA 70 L (GC 41-590-46), SUPRIMA 80 L (GC 41-590-47)
manualmanualPOTTERTON appliance manual — SUPRIMA 30 (GC 41-607-75), SUPRIMA 40 (GC 41-607-76), SUPRIMA 50 (GC 41-607-77), SUPRIMA 60 (GC 41-607-78), SUPRIMA 70 (GC 41-607-79), SUPRIMA 80 (GC 41-607-80)
manualmanualPOTTERTON appliance manual — SUPRIMA 30 HE (GC 41-075-35), SUPRIMA 40 HE (GC 41-075-36), SUPRIMA 50 HE (GC 41-075-37), SUPRIMA 60 HE (GC 41-075-38), SUPRIMA 70 HE (GC 41-075-39), SUPRIMA 80 HE (GC 41-075-40)
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