Navien
Navien O-Ring 20019090A
NBR O-ring, 33.7 x 3.5 mm, 70 Shore A, black, for Navien NCB-CE ERP boilers.
£4.08
£3.40 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 20019090A is an O-ring seal manufactured from NBR (nitrile rubber) for Navien NCB-CE ERP boilers. It seals a joint inside the appliance to prevent water loss at the connection. The ring has a 33.7 mm dimension with a 3.5 mm cross-section and a hardness of 70 Shore A.
Signs this part needs replacing
- Cracking, splitting or perishing of the rubber
- A hardened or flattened ring that no longer seals
- Weeping or dripping at the joint the ring seals
- Black rubber residue or debris around the seal seat
Before you order
- Confirm your boiler model against the fit list above
- Check the existing O-ring measures 33.7 x 3.5 mm with the same cross-section
- Inspect the seal seat for corrosion or scoring before fitting a new ring
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| NAVIEN NCB-CE 33KW SYSTEM BOILER ERP - (Serial Number 6665) | — | — | — | |
| NAVIEN NCB-CE 33KW SYSTEM BOILER ERP - (Serial Number 6665) | — | — | — | |
| NAVIEN NCB-CE 40KW COMBINATION BOILER ERP - (Serial Number 0131) | — | — | — | |
| NAVIEN NCB-CE 40KW COMBINATION BOILER ERP - (Serial Number 0131) | — | — | — |
Documents & drawings
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