Part number 90-423-7112 (often cross-referenced as 805-0112 or 92200060) is a generic Buna-N O-Ring with a 1/2" inner diameter and 3/32" cross-section. In the hot tub industry, it is primarily used as a seal for drain plugs and valve stems.
Because this is a standardized plumbing seal used in components from major suppliers like Waterway and Aqua-Flo, it is found in many spa brands. The following manufacturers and brands have used this part or the specific equipment assemblies it seals:
Waterway Plastics: This is a primary manufacturer of the drain plugs and center discharge pool/spa pumps that utilize this O-ring.
Aqua-Flo (by Gecko Alliance): Used in their line of Flo-Master pumps and associated drain assemblies.
Cal Spas: Frequently uses Waterway and Aqua-Flo equipment containing these standardized seals.
Artesian Spas: Utilizes Waterway-manufactured wet ends and drain components that require this specific O-ring.
Coleman Spas: Many older models feature Aqua-Flo pump assemblies, where this part is standard for the drain plug.
Pentair: This O-ring is often used as an alternative or replacement for specific Pentair valve stem seals.
Horizon Spa & Pool Parts: As a major distributor, they provide this part as a generic replacement for various brands.