Vaillant
Vaillant Pressure Relief Valve 0020236860
Vaillant pressure relief valve, 1 1/4 inch version, part number 0020236860, for compatible Vaillant unvented cylinders.
At a glance
- Also known as 1386978
£780.78
£650.65 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 0020236860 is a pressure relief valve supplied in its 1 1/4 inch version. It is a safety component for Vaillant unvented hot water cylinders, opening to release excess pressure and prevent over-pressurisation of the cylinder and associated pipework.
Signs this part needs replacing
- Water weeping or discharging continuously from the cylinder discharge pipe or tundish when the system is not overheating
- System pressure repeatedly rising or failing to settle during normal operation
- The valve failing to reseat after it has operated, leaving a persistent drip
- Visible scale, corrosion or debris around the valve seat or outlet
- Discharge pipework running warm or wet without a corresponding temperature or pressure event
Before you order
- Confirm the cylinder model matches one of the fitment listings above
- Check the existing valve is the 1 1/4 inch version before ordering
- Confirm the system is depressurised and drained before removal
- Check the discharge pipework and tundish for blockage while the system is drained
Compliance
| Alternative numbers | 1386978 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT VANTAGE VIH SW GB 500 BES | — | — | — | |
| VAILLANT VIH SW GB 500 BES | — | — | — |
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.
No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
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