Navien
Navien Flow Adjust Valve 30024805B
Flow adjust valve for Navien NCB500 combi boilers, part number 30024805B.
At a glance
- Part type: flow adjust valve
- Appliance family: NCB500
£70.94
£59.12 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 Navien flow adjust valve, part number 30024805B, is a water circuit component used on Navien NCB500 combi boilers. It regulates the flow rate through the boiler's water path so the flow can be set to suit the installation. It is a serviceable part for engineers working on the NCB500 range.
Signs this part needs replacing
- Domestic hot water flow rate cannot be set, or holds at the wrong rate
- Flow rate drifts away from the set position after adjustment
- Water weeping or dripping from the valve body or spindle
- Adjustment knob or spindle stiff, seized or unresponsive
- Temperature instability at the tap linked to incorrect flow through the boiler
Before you order
- Confirm your boiler model against the fitment list above.
- Check the appliance serial number where the fitment list specifies one.
- Match part number 30024805B to the valve currently fitted.
- If your model is not listed, check the manufacturer's parts list before ordering.
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| NAVIEN NCB500-1S+/32K COMBI - (Serial Number 3924) | — | — | — | |
| NAVIEN NCB500-1S+/32K COMBI - (Serial Number 3924) | — | — | — | |
| NAVIEN NCB500-2S+/41K COMBI - (Serial Number 3712) | — | — | — | |
| NAVIEN NCB500-2S+/41K COMBI - (Serial Number 3712) | — | — | — | |
| NAVIEN NCB500-2S/37K COMBI - (Serial Number 3735) | — | — | — | |
| NAVIEN NCB500-2S/37K COMBI - (Serial Number 3735) | — | — | — |
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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