Vaillant
Vaillant Gasket G 3/4 0020073878
Vaillant G 3/4 gasket, part 0020073878, for compatible Vaillant gas boilers.
At a glance
- Also known as 1387598
Showing prices
£9.42
£7.85 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 Vaillant G 3/4 gasket, part number 0020073878, is a sealing component for Vaillant gas boilers. It is used at a G 3/4 connection to help maintain a tight seal. It is listed for use across a range of Vaillant Ecotec, Ecofit and HOME appliances.
Signs this part needs replacing
- Visible cracking, hardening or flattening of the gasket
- Water or gas leakage at the G 3/4 joint
- Weeping or residue around the sealing face
- Gasket damage after dismantling the joint
- Pressure loss where the gasket seals
Before you order
- Confirm the part number 0020073878 matches the existing gasket or the manufacturer's parts list.
- Check the appliance model against the fit list.
- Inspect the connection size and sealing face for damage.
- Confirm the required pack quantity for the job.
Compliance
| Alternative numbers | 1387598 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT HOME COMBI 25 -A | 47-044-62 | 47-044-62 | — | — |
| VAILLANT HOME COMBI 30 -A | 47-044-63 | 47-044-63 | — | — |
| VAILLANT HOME COMBI 35 -A | 47-044-64 | 47-044-64 | — | — |
| VAILLANT HOME SYSTEM 12 -A | 41-044-94 | 41-044-94 | — | — |
| VAILLANT HOME SYSTEM 15 -A | 41-044-95 | 41-044-95 | — | — |
| VAILLANT HOME SYSTEM 18 -A | 41-044-96 | 41-044-96 | — | — |
| VAILLANT HOME SYSTEM 25 -A | 41-044-97 | 41-044-97 | — | — |
| VAILLANT VU 126/6-5 OV | 41-044-71 | 41-044-71 | — | — |
| VAILLANT VU 156/6-5 OV | 41-044-72 | 41-044-72 | — | — |
| VAILLANT VU 186/6-5 OV | 41-044-73 | 41-044-73 | — | — |
Showing 10 of 39 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
VAILLANT appliance manual — HOME COMBI 25 -A (GC 47-044-62), HOME COMBI 30 -A (GC 47-044-63), HOME COMBI 35 -A (GC 47-044-64)
manualmanualVAILLANT appliance manual — HOME SYSTEM 12 -A (GC 41-044-94), HOME SYSTEM 15 -A (GC 41-044-95), HOME SYSTEM 18 -A (GC 41-044-96), HOME SYSTEM 25 -A (GC 41-044-97)
manualmanualVAILLANT appliance manual — VU 126/6-5 OV (GC 41-044-71), VU 156/6-5 OV (GC 41-044-72), VU 186/6-5 OV (GC 41-044-73), VU 246/6-5 OV (GC 41-044-74), VU 306/6-5 OV (GC 41-044-75), ecoTEC PLUS 412 VU 126/6-5 OV (2015) (GC 41-044-71), ecoTEC PLUS 415 VU 156/6-5 OV (2015) (GC 41-044-72), ecoTEC PLUS 418 VU 186/6-5 OV (2015) (GC 41-044-73), ecoTEC PLUS 424 VU 246/6-5 OV (2015) (GC 41-044-74), ecoTEC PLUS 430 VU 306/6-5 OV (2015) (GC 41-044-75)
manualmanualVAILLANT appliance manual — ecoFIT PURE 612 - VU 126/6-3 (2016) (GC 41-694-03), ecoFIT PURE 615 - VU 156/6-3 (2016) (GC 41-694-04), ecoFIT PURE 618 - VU 186/6-3 (2016) (GC 41-694-05), ecoFIT PURE 625 - VU 256/6-3 (2016) (GC 41-694-06), ecoFIT PURE 630 - VU 306/6-3 (2016) (GC 41-694-07)
manualmanualVAILLANT appliance manual — ecoFIT PURE 825 - VUW 256/6-3 (2016) (GC 47-044-68), ecoFIT PURE 830 - VUW 306/6-3 (2016) (GC 47-044-74), ecoFIT PURE 835 - VUW 356/6-3 (2016) (GC 47-044-70)
manualmanualVAILLANT appliance manual — ecoFIT SUSTAIN 615 - VU 156/6-3 (2018) (GC 41-694-30), ecoFIT SUSTAIN 618 - VU 186/6-3 (2018) (GC 41-694-31), ecoFIT SUSTAIN 630 - VU 306/6-3 (2018) (GC 41-694-32)
manualmanualVAILLANT appliance manual — ecoFIT SUSTAIN 825 - VUW 256/6-3 (2016) (GC 47-044-71), ecoFIT SUSTAIN 830 - VUW 306/6-3 (2016) (GC 47-044-72), ecoFIT SUSTAIN 835 - VUW 356/6-3 (2016) (GC 47-044-73)
manualmanualVAILLANT appliance manual — ecoTEC SUSTAIN 24 VUW 246/7-2 (2017) (GC 47-044-79), ecoTEC SUSTAIN 28 VUW 286/7-2 (2017) (GC 47-044-80), ecoTEC SUSTAIN 34 VUW 346/7-2 (2017) (GC 47-044-81)
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