Glow-worm
Glow-worm Water Pressure Switch 2000800656
Low water pressure switch with O-ring for Glow-worm Micron and Ultimate FF boilers.
At a glance
- Also known as 1330541
£54.86
£45.72 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 Glow-worm 2000800656 is a low water pressure switch supplied complete with its O-ring. It monitors water pressure within the heating circuit and signals the boiler control when pressure falls outside the operating range. It is used across the Glow-worm Micron and Ultimate FF appliance families.
Signs this part needs replacing
- Boiler locks out or fails to fire despite adequate system pressure
- Pressure gauge reads normal but the boiler behaves as though pressure is low
- Intermittent firing or nuisance lockouts that clear on reset
- Water weeping from around the switch body or its O-ring seal
- Fault code or diagnostic indication pointing to a low water pressure fault
Before you order
- Confirm your boiler model against the fitment list above
- Check the part number on the existing switch matches 2000800656
- Inspect the O-ring seating face on the boiler for damage or debris before fitting
- Verify system pressure with an accurate gauge before diagnosing the switch
Compliance
| GC number | E39-799 |
|---|---|
| Barcode / EAN | 5037985018640 |
| Alternative numbers | 1330541 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| GLOWWORM GLOWWORM MICRON 100FF | — | — | — | |
| GLOWWORM GLOWWORM MICRON 120FF | — | — | — | |
| GLOWWORM GLOWWORM ULTIMATE 100FF | — | — | — | |
| GLOWWORM GLOWWORM ULTIMATE 120FF | — | — | — | |
| GLOWWORM MICRON 100FF | 41-047-22 | 41-047-22 | — | — |
| GLOWWORM MICRON 120FF | 41-047-23 | 41-047-23 | — | — |
| GLOWWORM ULTIMATE 100FF | 41-319-61 | 41-319-61 | — | — |
| GLOWWORM ULTIMATE 120FF | 41-319-75 | 41-319-75 | — | — |
| SAUNIER DUVAL SAUNIER DUVAL XEON 100 120FF | — | — | — |
Documents & drawings
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