Vaillant
Vaillant Pressure Relief Valve 0020268797
Vaillant 4 bar pressure relief valve, part number 0020268797, for Ecotec VU 446/5-5 and VU 606/5-5 appliances.
At a glance
- Also known as 1388728
£34.98
£29.15 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 0020268797 is a pressure relief valve rated at 4 bar, used on Vaillant Ecotec VU appliances. It opens to discharge water when system pressure exceeds its set rating, protecting the boiler and heating circuit from over-pressurisation. It is a serviceable safety component within the boiler's hydraulic assembly.
Signs this part needs replacing
- Water discharging from the pressure relief discharge pipe when the system is not over-pressurised
- Boiler pressure gauge dropping repeatedly, requiring frequent top-ups
- System pressure rising above normal operating range with no other cause identified
- Valve outlet continually weeping or dripping after the system has been filled and vented
- Scale or debris visible at the valve seat or outlet, preventing it from sealing
Before you order
- Confirm your appliance model and GC number against the fitment list above
- Check the existing valve is rated at 4 bar before ordering
- Inspect the valve connections and seating area for damage or debris
- Verify the system has been correctly filled and vented, as low or high pressure can mimic valve failure
Compliance
| Alternative numbers | 1388728 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT VU 446/5-5 | 41-694-28 | 41-694-28 | — | — |
| VAILLANT VU 606/5-5 | 41-694-29 | 41-694-29 | — | — |
| VAILLANT ecoTEC VU 446/5-5 (2018) | 41-694-28 | 41-694-28 | — | — |
| VAILLANT ecoTEC VU 606/5-5 (2018) | 41-694-29 | 41-694-29 | — | — |
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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