Description
The Navien 20030919A O-Ring is a genuine OEM replacement part designed for Navien NCB-E series tankless water heaters. Made from durable EPDM material with dimensions of 17mm inner diameter, 4mm thickness, and 70 durometer hardness, this black O-ring ensures a secure and leak-free seal in various components of the heating system.
Key Features:
- Genuine OEM Part – Designed specifically for Navien NCB-E series models
- Durable EPDM Construction – Resistant to heat, ozone, and weathering
- Precise Dimensions – 17mm inner diameter, 4mm thickness, 70 durometer hardness
- Black Color – Standard color for easy identification
- Ensures Leak-Free Operation – Maintains system efficiency and safety











