Vaillant
Vaillant Pressure Relief Valve 0020236859
Vaillant pressure relief valve, 1 inch version, part number 0020236859 for VIH SW GB 500 BES cylinders.
At a glance
- Also known as 1386976
£561.52
£467.93 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 0020236859 is a pressure relief valve supplied in the 1 inch version. It is fitted to Vaillant unvented cylinder appliances and opens to discharge water when system pressure exceeds the valve's set limit, protecting the cylinder and associated pipework. It forms part of the safety group on the appliance.
Signs this part needs replacing
- Water continually discharging from the relief pipe or tundish when the system is at normal operating pressure
- The valve weeping or dripping from the outlet with no rise in pressure
- System pressure repeatedly dropping and needing topping up
- The valve failing to reseat after it has opened, leaving a permanent discharge
- Scale or debris visible at the valve seat or outlet, preventing a clean seal
Before you order
- Confirm your appliance model against the fit list above before ordering
- Check that the existing valve is the 1 inch version, as this part is version-specific
- Investigate the expansion vessel and system pressure, as discharge can also be caused by a failed vessel rather than the valve itself
- Isolate and depressurise the cylinder before removal, and check the discharge pipework is clear
Compliance
| Alternative numbers | 1386976 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT VANTAGE VIH SW GB 500 BES | — | — | — | |
| VAILLANT VIH SW GB 500 BES | — | — | — |
Documents & drawings
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