Vaillant
Vaillant Pressure Relief Valve PT20 0020231103
Vaillant PT20 pressure relief valve with a 3/4 inch connection, listed for the VIH SW GB 500 BES unvented cylinder.
At a glance
- Also known as 1386892
£142.62
£118.85 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 PT20 pressure relief valve is a Vaillant safety component with a 3/4 inch connection, used to discharge excess pressure from the cylinder and its associated pipework. It is listed for the Vaillant VIH SW GB 500 BES unvented cylinder range. The valve opens when system pressure exceeds its setting, releasing water through the discharge pipe to protect the cylinder and connected components.
Signs this part needs replacing
- Water continually weeping or dripping from the valve outlet when the system is at normal operating pressure.
- The valve fails to reseat after discharging, leaving a permanent trickle through the discharge pipe.
- Scale, debris or corrosion on the seat preventing the valve from closing fully.
- Discharge occurring at pressures well below the valve's intended opening point.
- Visible corrosion, cracking or deformation of the valve body or its connection.
Before you order
- Confirm your appliance model against the fit list above, as compatibility is limited to the listed cylinders.
- Check the existing valve is a PT20 with a 3/4 inch connection before ordering.
- Verify the part number 0020231103 matches the component being replaced.
- Confirm the system pressure reading and discharge behaviour to rule out faults elsewhere in the circuit.
Compliance
| Alternative numbers | 1386892 |
|---|
| 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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