Glow-worm
Glow-worm Outside Wall Seal 0020020507
Glow-worm black outside wall seal for flue terminals, sized for 100 mm to 165 mm wall openings.
At a glance
- Also known as 1337687
Showing prices
£26.36
£21.97 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 Glow-worm outside wall seal (part number 0020020507) is a black flue component that seals the external wall penetration around the flue terminal. It is sized for wall openings from 100 mm to 165 mm and is used across a range of Glow-worm gas boilers.
Signs this part needs replacing
- The seal is cracked, split or perished
- Water is tracking in around the flue penetration
- Draughts or visible gaps around the flue at the outside wall
- The seal has hardened or lost its shape, leaving the wall opening unsealed
Before you order
- Check your boiler model and GC number against the fitment list above
- Measure the wall thickness at the flue penetration to confirm it falls within the 100 mm to 165 mm range
- Inspect the flue terminal and wall opening for damage before fitting
Compliance
| Alternative numbers | 1337687 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| GLOWWORM BETACOM 2 24 | 47-019-16 | 47-019-16 | — | — |
| GLOWWORM BETACOM 2 28 | 47-019-17 | 47-019-17 | — | — |
| GLOWWORM BETACOM 24 A | 47-019-13 | 47-019-13 | — | — |
| GLOWWORM BETACOM 28 A | 47-019-14 | 47-019-14 | — | — |
| GLOWWORM BETACOM 3 24C | 47-019-41 | 47-019-41 | — | — |
| GLOWWORM BETACOM 3 30C | 47-019-42 | 47-019-42 | — | — |
| GLOWWORM BETACOM 4 24C | 47-019-52 | 47-019-52 | — | — |
| GLOWWORM BETACOM 4 30C | 47-019-53 | 47-019-53 | — | — |
| GLOWWORM BG330 PLUS | — | — | — | |
| GLOWWORM BRITISH GAS BG330+ | 41-019-11 | 41-019-11 | — | — |
Showing 10 of 122 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
GLOWWORM appliance manual — BETACOM 2 24 (GC 47-019-16)
manualmanualGLOWWORM appliance manual — BETACOM 2 28 (GC 47-019-17)
manualmanualGLOWWORM appliance manual — BETACOM 24 A (GC 47-019-13), BETACOM 28 A (GC 47-019-14)
manualmanualGLOWWORM appliance manual — BETACOM 3 24C (GC 47-019-41), BETACOM 3 30C (GC 47-019-42)
manualmanualGLOWWORM appliance manual — BETACOM 4 24C (GC 47-019-52), BETACOM 4 30C (GC 47-019-53)
manualmanualGLOWWORM appliance manual — BRITISH GAS BG330+ (GC 41-019-11)
manualmanualGLOWWORM appliance manual — EASICOM 2 24C (GC 47-019-22), EASICOM 2 28C (GC 47-019-23)
manualmanualGLOWWORM appliance manual — EASICOM 24 (GC 47-019-18)
manualmanualGLOWWORM appliance manual — EASICOM 28 (GC 47-019-19)
manualmanualGLOWWORM appliance manual — EASICOM 3 24C (GC 47-019-50), EASICOM 3 28C (GC 47-019-51)
manualmanualGLOWWORM appliance manual — EASICOM 3 25R (GC 41-019-50)
manualmanualGLOWWORM appliance manual — EASICOM 3 25S (GC 41-019-49)
manualmanualGLOWWORM appliance manual — ENERGY 12R (GC 41-019-21), ENERGY 15R (GC 41-019-22), ENERGY 18R (GC 41-019-23), ENERGY 25R (GC 41-019-24), ENERGY 30R (GC 41-019-25)
manualmanualGLOWWORM appliance manual — ENERGY 12S (GC 41-019-16), ENERGY 15S (GC 41-019-17), ENERGY 18S (GC 41-019-18), ENERGY 25S (GC 41-019-19), ENERGY 30S (GC 41-019-20)
manualmanualGLOWWORM appliance manual — ENERGY 25C (GC 47-019-24), ENERGY 30C (GC 47-019-25), ENERGY 35C (GC 47-019-26)
manualmanualGLOWWORM appliance manual — ESSENTIAL 24C (GC 47-019-27), ESSENTIAL 28C (GC 47-019-28)
manualmanualGLOWWORM appliance manual — ESSENTIAL 24C - P (GC 47-019-39)
manualmanualGLOWWORM appliance manual — FLEXICOM 18SX (GC 41-315-72)
manualmanualGLOWWORM appliance manual — FLEXICOM 30SX (GC 41-047-76)
manualmanualGLOWWORM appliance manual — SUSTAIN 12R (GC 41-019-39), SUSTAIN 15R (GC 41-019-40), SUSTAIN 18R (GC 41-019-41)
manualmanualGLOWWORM appliance manual — SUSTAIN 12S (GC 41-019-36), SUSTAIN 15S (GC 41-019-37), SUSTAIN 18S (GC 41-019-38)
manualmanualGLOWWORM appliance manual — SUSTAIN 35C (GC 47-019-34)
manualmanualGLOWWORM appliance manual — ULTIMATE 2 30C (GC 47-019-35), ULTIMATE 2 35C (GC 47-019-36)
manualmanualGLOWWORM appliance manual — ULTIMATE 24H (GC 41-019-15)
manualmanualGLOWWORM appliance manual — ULTIMATE 3 25R (GC 41-019-52)
manualmanualGLOWWORM appliance manual — ULTIMATE 3 25S (GC 41-019-51)
manualmanualGLOWWORM appliance manual — ULTIMATE 3 30C (GC 47-019-55), ULTIMATE 3 35C (GC 47-019-57)
manualmanualGLOWWORM appliance manual — ULTIMATE 30C (GC 47-044-48), ULTIMATE 35C (GC 47-044-49)
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