Vaillant
Vaillant Temperature & Pressure Relief Valve 0020009866
Vaillant temperature and pressure relief valve, part number 0020009866, for use with Vaillant unvented cylinder models.
At a glance
- Part type: temperature and pressure relief valve
- Also known as 1379442
£132.13
£110.11 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 0020009866 is a temperature and pressure relief valve used on Vaillant unvented hot water cylinders. It opens to discharge water if the stored water overheats or the system pressure rises beyond the valve's setting, protecting the cylinder from over-pressure and over-temperature conditions. It is listed by the manufacturer under pressure relief and safety valves for the Vaillant cylinder range.
Signs this part needs replacing
- Water weeping or discharging continuously from the valve outlet when the cylinder is at normal temperature and pressure
- The valve fails to discharge when tested, or the test lever does not return freely
- Scale or corrosion visible around the valve seat or outlet
- Dripping from the valve body or its connections
- Repeated discharge during normal heating cycles
Before you order
- Confirm the cylinder model and serial details against the fitment list above
- Check the valve setting and connection size on the existing valve before ordering
- Inspect the discharge pipework and tundish for blockage or scale while access is available
- Confirm whether the cylinder requires any other service parts at the same time
Compliance
| Barcode / EAN | 4024074492147 |
|---|---|
| Alternative numbers | 1379442 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT TEMP & PRESS RELIEF VALVE | — | — | — | |
| VAILLANT VANTAGE VIH GB 180/2 S | — | — | — | |
| VAILLANT VANTAGE VIH GB 260/2 S | — | — | — | |
| VAILLANT VANTAGE VIH GB 310/2 S | — | — | — | |
| VAILLANT VIH GB 180/2 S | — | — | — | |
| VAILLANT VIH GB 260/2 S | — | — | — | |
| VAILLANT VIH GB 310/2 S | — | — | — | |
| VAILLANT VIH S GB 210/2 S | — | — | — | |
| VAILLANT VIH S GB 260/2 S | — | — | — | |
| VAILLANT VIH S GB 310/2 S | — | — | — |
Showing 10 of 17 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 — VIH GB 180/2 S, VIH GB 260/2 S, VIH GB 310/2 S, uniSTOR VIH GB 180/2 S (2011), uniSTOR VIH GB 260/2 S (2011), uniSTOR VIH GB 310/2 S (2011)
manualmanualVAILLANT appliance manual — auroSTOR VIH S GB 210/2 S (2011), auroSTOR VIH S GB 260/2 S (2011), auroSTOR VIH S GB 310/2 S (2011)
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