Navien
Navien Valve Kit 30029203A
Valve kit for Navien NCB300 combi boilers, part number 30029203A.
At a glance
- Appliance family: NCB300 combi
£146.34
£121.95 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 30029203A is a valve kit supplied for the NCB300 range of combi boilers. It forms part of the appliance's water and heating circuit control, and is listed by the manufacturer under the NCB300 combi family. The kit is identified by part number 30029203A.
Signs this part needs replacing
- Water weeping or dripping from the valve body or its connections
- Visible corrosion, scale or debris build-up around the valve
- Loss of system pressure that cannot be traced to another component
- Poor or inconsistent hot water and heating performance linked to the valve
- Fault codes or lockouts on the boiler relating to water circuit control
Before you order
- Confirm your boiler model against the fitment list above
- Check the part number on the existing component matches 30029203A
- Verify the valve kit configuration is correct for your appliance variant
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| NAVIEN NCB300-28K COMBI - (Serial Number 3710) | — | — | — | |
| NAVIEN NCB300-28K COMBI - (Serial Number 3710) | — | — | — | |
| NAVIEN NCB300-37K COMBI - (Serial Number 3734) | — | — | — | |
| NAVIEN NCB300-37K COMBI - (Serial Number 3734) | — | — | — | |
| NAVIEN NCB300-41K COMBI - (Serial Number 3711) | — | — | — | |
| NAVIEN NCB300-41K COMBI - (Serial Number 3711) | — | — | — |
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.
No technical questions yet for this part.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.