Description
The Navien 20017923A is a genuine OEM EPDM O-ring designed to deliver a dependable, leak-free seal in Navien EWK270 water heater applications. Manufactured from Ethylene Propylene Diene Monomer (EPDM) rubber, this P29-grade O-ring offers excellent resistance to heat, steam, and water — making it an ideal sealing solution for the demanding conditions found inside tankless and condensing water heating systems.
As an NSF-certified component, this O-ring meets rigorous standards for use in potable water systems, ensuring safe, compliant performance in residential and light commercial installations. Using genuine Navien replacement parts helps maintain system integrity, preserve warranty coverage, and ensure proper fit without modification.
Key Features
- Genuine Navien OEM replacement O-ring — SKU 20017923A
- EPDM (Ethylene Propylene Diene Monomer) rubber construction
- P29 O-ring designation for precise dimensional fit
- NSF certified — safe for potable water system applications
- Designed for use in Navien EWK270 water heater systems
- Excellent resistance to heat, steam, and water exposure
- Helps prevent leaks and maintain system pressure integrity
Application
- Compatible with: Navien EWK270 series water heaters
- Suitable for residential and light commercial installations
- Ideal for routine maintenance, service calls, and leak repairs
Why Choose Genuine Navien Parts?
Using factory-authorized replacement components like the 20017923A O-ring ensures your Navien system continues to operate at peak efficiency. Aftermarket substitutes may not meet the precise tolerances required for a proper seal, potentially leading to leaks, system downtime, or voided warranties. Trust genuine Navien parts for every service and repair.







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