Navien
Navien Packing Heat Exchanger Top 20018376B
Heat exchanger top packing for Navien NCB-CE system and combination boilers, supplied under part number 20018376B.
£22.84
£19.03 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 heat exchanger top packing is a sealing component that sits at the top of the heat exchanger on NCB-CE boilers. It closes the joint at the top of the heat exchanger assembly, helping to keep the water circuit sealed. It is supplied under Navien part number 20018376B.
Signs this part needs replacing
- Water weeping or staining at the top of the heat exchanger
- The packing feels hard, flattened or cracked
- Scale or corrosion marks around the joint face
- Falling system pressure or frequent topping up
- A slight leak after the heat exchanger has been disturbed
Before you order
- Confirm your boiler model and serial number against the fitment list
- Check that the packing is the correct item for the heat exchanger top on your NCB-CE
- Inspect the mating surfaces for damage before fitting
- Have any other seals or gaskets to hand if the joint is being opened
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| NAVIEN NCB-CE 28KW SYSTEM BOILER ERP - (Serial Number 6664) | — | — | — | |
| NAVIEN NCB-CE 28KW SYSTEM BOILER ERP - (Serial Number 6664) | — | — | — | |
| NAVIEN NCB-CE 33KW SYSTEM BOILER ERP - (Serial Number 6665) | — | — | — | |
| NAVIEN NCB-CE 33KW SYSTEM BOILER ERP - (Serial Number 6665) | — | — | — | |
| NAVIEN NCB-CE 34KW COMBINATION BOILER ERP - (Serial Number 0130) | — | — | — | |
| NAVIEN NCB-CE 34KW COMBINATION BOILER ERP - (Serial Number 0130) | — | — | — | |
| NAVIEN NCB-CE 34KW COMBINATION BOILER ERP - (Serial Number 2572) | — | — | — | |
| NAVIEN NCB-CE 34KW COMBINATION BOILER ERP - (Serial Number 2572) | — | — | — | |
| NAVIEN NCB-CE 40KW COMBINATION BOILER ERP - (Serial Number 0131) | — | — | — | |
| NAVIEN NCB-CE 40KW COMBINATION BOILER ERP - (Serial Number 0131) | — | — | — |
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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