O-Ring, 3″ ID, 3/16″ Cross Section, O-109 | Q4337

Horizon is now utilizing the AS568A O-Ring standard used by the O-Ring industry in order to bring a standardized approach to the pool and spa industry. The current active Horizon part number for an o-ring is 90-423-5xxx, where xxx represents the AS568A designation. This designation ranges from -001 thru -932, in order of smallest to largest first by cross section then by diameter. Please see substitute item number under “Quick info” for the current SKU for this item.