Vaillant
Vaillant O-Ring For Venturi Plate 981331
Vaillant 981331 O-ring seal for the venturi plate on Ecotec PLUS and VU series gas boilers.
At a glance
- Part type: O-ring seal for venturi plate
- Also known as 1378786
- Have the part fitted by a Gas Safe registered engineer, as the venturi plate sits in the gas path
£9.64
£8.03 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 Vaillant 981331 is an O-ring seal for the venturi plate on Vaillant gas boilers. It seals the joint at the venturi plate, which sits in the air/gas path and meters the gas flow into the burner. A sound seal here is essential to correct combustion and stable boiler operation.
Signs this part needs replacing
- Visible cracking, flattening or perishing of the O-ring
- Whistling or unusual noise from the venturi or air/gas inlet area
- Combustion readings drifting out of tolerance on flue gas analysis
- Traces of gas smell or leak detection fluid bubbling at the venturi plate joint
- Discolouration or hardening of the seal after service work
Before you order
- Confirm your boiler model against the fitment list above before ordering
- Check the existing O-ring for damage and confirm the venturi plate joint is the source of the fault
- Have the part fitted by a Gas Safe registered engineer, as the venturi plate sits in the gas path
- Verify the part number 981331 on the appliance's parts list for your exact model
Compliance
| Barcode / EAN | 4024074432365 |
|---|---|
| Alternative numbers | 1378786 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT VAILLANT ECOTEC PLUS 415 VU GB 156-2-0H | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 418 VU GB 186-2-0H | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 428 VU GB 286-2-0H | — | — | — | |
| VAILLANT VAILLANT ECOTEC PLUS 438 VU GB 386-2-0H | — | — | — | |
| VAILLANT VU 156 | 41-044-53 | 41-044-53 | — | — |
| VAILLANT VU 186 | 41-044-54 | 41-044-54 | — | — |
| VAILLANT VU 186-O | 41-044-30 | 41-044-30 | — | — |
| VAILLANT VU 286 | 41-044-55 | 41-044-55 | — | — |
| VAILLANT VU 286-O | 41-044-31 | 41-044-31 | — | — |
| VAILLANT VU 386 | 41-044-57 | 41-044-57 | — | — |
Showing 10 of 24 compatible appliances.
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.
VAILLANT appliance manual — VU 156 (GC 41-044-53), VU 186 (GC 41-044-54), VU 286 (GC 41-044-55), VU 286-O (GC 41-044-31), VU 386 (GC 41-044-57), ecoTEC PLUS 415 VU 156 (2006) (GC 41-044-53), ecoTEC PLUS 418 VU 186 (2006) (GC 41-044-54), ecoTEC PLUS 428 VU 286 (2006) (GC 41-044-55), ecoTEC PLUS 438 VU 386 (2006) (GC 41-044-57)
manualmanualVAILLANT appliance manual — VU 186-O (GC 41-044-30), ecoMAX PRO 18E VU 186-0 (2003-2006) (GC 41-044-30), ecoMAX PRO 28E VU 286-0 (2003-2006) (GC 41-044-31)
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