Generic Buna-N O-Ring [15-15/16" ID] [5/16" CS] (90-423-6115) plugs or too compromised to support

or too compromised to support a reliable rebuild

more confidence-inspiring filter repair overall

Designed for compatible Crystal Water systems

or producing inconsistent ignition performance

Improves sensing confidence and repair accuracy

Generic Buna-N O-Ring [15-15/16" ID] [5/16" CS] (90-423-6115) plugs or too compromised to supportA Buna N O ring helps create a seal at a compatible large diameter circular connection, and this generic version is sized with a 15 15 16 inch inside diameter and a substantial 5 16 inch cross section using the 90 423 6115 reference. When a large profile O ring becomes worn, stretched, or compressed, the assembly can lose the sealing support it should maintain around the full circumference. The heavier 5 16 inch cross section gives this O ring