Navien
Navien Adaptor S.H Return 30029021A
Navien S.H return adaptor, part 30029021A, for NCB300 combi boilers.
£67.04
£55.87 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 S.H Return (part number 30029021A) is a connection component used on Navien NCB300 combi boilers. It provides the S.H return connection point between the boiler and the system pipework. It is manufactured by Navien for the NCB300 combi range.
Signs this part needs replacing
- Weeping or visible water at the return connection
- Corrosion, scale or discolouration on the adaptor body or threads
- Damaged or cross-threaded connection that will not seal
- Loss of system pressure traced to the return connection
- Signs of heat damage at the joint
Before you order
- Confirm the boiler model and serial number against the fitment list
- Check the existing adaptor for thread type and size before removal
- Confirm whether a washer or seal is required separately
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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