Navien
Navien O-Ring EWK270
EPDM O-ring, 17.5 x 2.7 mm, 70 durometer, black, NSF listed, for Navien NCB-CE boilers and NPE-AWE/NPE-SWE water heaters.
£3.91
£3.26 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 EWK270 is an EPDM O-ring measuring 17.5 x 2.7 mm with a 70 durometer hardness rating, supplied in black. It seals the joint faces on Navien NCB-CE system and combination boilers and NPE-AWE and NPE-SWE water heaters, holding a watertight seal under pressure and temperature cycling.
Signs this part needs replacing
- Water weeping or dripping from the joint the O-ring seals
- Visible hardening, cracking or flattening of the O-ring
- Scale or mineral deposits around the sealing face
- A joint that continues to leak after being re-tightened
- An O-ring that is stretched or deformed on removal
Before you order
- Confirm your appliance model and serial number against the fit list
- Check the existing O-ring measures 17.5 x 2.7 mm
- Check how many O-rings the joint requires before ordering
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| NAVIEN NCB-CE 20KW SYSTEM BOILER ERP - (Serial Number 6662) | — | — | — | |
| NAVIEN NCB-CE 20KW SYSTEM BOILER ERP - (Serial Number 6662) | — | — | — | |
| NAVIEN NCB-CE 23KW SYSTEM BOILER ERP - (Serial Number 6663) | — | — | — | |
| NAVIEN NCB-CE 23KW SYSTEM BOILER ERP - (Serial Number 6663) | — | — | — | |
| NAVIEN NCB-CE 24KW COMBINATION BOILER ERP - (Serial Number 0128) | — | — | — | |
| NAVIEN NCB-CE 24KW COMBINATION BOILER ERP - (Serial Number 0128) | — | — | — | |
| NAVIEN NCB-CE 24KW COMBINATION BOILER ERP - (Serial Number 2570) | — | — | — | |
| NAVIEN NCB-CE 24KW COMBINATION BOILER ERP - (Serial Number 2570) | — | — | — | |
| NAVIEN NCB-CE 28KW COMBINATION BOILER ERP - (Serial Number 0129) | — | — | — | |
| NAVIEN NCB-CE 28KW COMBINATION BOILER ERP - (Serial Number 0129) | — | — | — |
Showing 10 of 30 compatible appliances.
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.
NAVIEN appliance manual — NCB-CE 20KW SYSTEM BOILER ERP - (Serial Number 6662), NCB-CE 23KW SYSTEM BOILER ERP - (Serial Number 6663), NCB-CE 24KW COMBINATION BOILER ERP - (Serial Number 0128), NCB-CE 24KW COMBINATION BOILER ERP - (Serial Number 2570), NCB-CE 28KW COMBINATION BOILER ERP - (Serial Number 0129), NCB-CE 28KW COMBINATION BOILER ERP - (Serial Number 2571), NCB-CE 28KW SYSTEM BOILER ERP - (Serial Number 6664), NCB-CE 33KW SYSTEM BOILER ERP - (Serial Number 6665), NCB-CE 34KW COMBINATION BOILER ERP - (Serial Number 0130), NCB-CE 34KW COMBINATION BOILER ERP - (Serial Number 2572), NCB-CE 40KW COMBINATION BOILER ERP - (Serial Number 0131)
manualmanualNAVIEN appliance manual — NPE-AWE CE-24A - (Serial Number 5093), NPE-AWE CE-32A - (Serial Number 5095), NPE-SWE CE-24S - (Serial Number 5094), NPE-SWE CE-32S - (Serial Number 5096)
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