Vaillant
Vaillant Diverter Valve 0020127174
Vaillant diverter valve, part number 0020127174, for VWL 45/1 A and VWL 65/1 A 230V heat pump appliances.
At a glance
- Appliance family: VWL 45/1 A and VWL 65/1 A 230V heat pumps
- Also known as 1385792
£207.68
£173.07 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 0020127174 is a diverter valve used in Vaillant VWL 45/1 A and VWL 65/1 A 230V heat pump appliances, including Geotherm variants. It directs water flow between the heating circuit and the domestic hot water circuit according to demand. The valve is a serviceable component within the appliance's hydraulic assembly.
Signs this part needs replacing
- Domestic hot water runs cold or fails to reach temperature while heating continues to work
- Heating circuit warms when only hot water is demanded, or hot water is produced when only heating is demanded
- Unstable or fluctuating hot water temperature at the tap
- Diverter valve actuator moves without changing the flow path, or the valve body is stiff or seized
- Water weeping from the valve body or its seals
Before you order
- Confirm your appliance model matches one of the fit lines above, including the 230V designation
- Check the part number on the existing valve against 0020127174 before ordering
- Verify the fault is with the valve itself rather than the actuator or its wiring, where applicable
- Have the appliance model and serial number to hand when checking compatibility
Mechanical
| Part type | DIVERTER VALVE & HYDRAULICS |
|---|
Compliance
| Manufacturer part number (MPN) | 0020127174 |
|---|---|
| Alternative numbers | 1385792 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT VWL 45/1 A 230V | — | — | — | |
| VAILLANT VWL 65/1 A 230V | — | — | — | |
| VAILLANT geoTHERM VWL 45/1 A 230V | — | — | — | |
| VAILLANT geoTHERM VWL 65/1 A 230V | — | — | — |
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.
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