Navien
Navien Adaptor SC Inlet 20058104A
Navien SC inlet adaptor for NCB300 combi boilers, used at the appliance inlet connection.
At a glance
- Part type: SC inlet adaptor
£4.64
£3.87 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 Adaptor SC Inlet is an inlet connection adaptor for Navien NCB300 series combi boilers. It forms part of the appliance inlet assembly, providing the connection point between the boiler and the incoming supply pipework. It is a Navien-manufactured component identified by part number 20058104A.
Signs this part needs replacing
- Weeping or visible water at the inlet connection
- Corrosion, scale or mineral build-up around the adaptor body
- Damaged or cross-threaded connection threads
- A joint that will not seal after re-making
- Cracking or deformation of the adaptor
Before you order
- Check the boiler data badge to confirm the model is one of the NCB300 variants listed
- Confirm the serial number against the fitment information where applicable
- Inspect the existing adaptor and its sealing face for thread or seat damage before ordering
- Confirm the part number 20058104A matches the component being replaced
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.
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