Generic O-Ring [15-11/16" ID] [3/8" CS] O-488 (O-488) jacuzziwhirlpool and this generic version is

and this generic version is sized with a 25-3/16 inch inside diameter and 3/8 inch cross-section using the O-340 reference

This Waterway part is a strong replacement choice when the original

hydrotherapy

0kW Flo-Thru Incoloy Heater (26-1001-5S-K) is a replacement heater developed around the fit and operating requirements of Leisure Bay

Waterway union tailpiece

Generic O-Ring [15-11/16" ID] [3/8" CS] O-488 (O-488) jacuzziwhirlpool and this generic version isGeneric O Ring [15 11 16" ID] [3 8" CS] O 488 (O 488) is a replacement O ring from Generic for compatible pool, spa, bath, pump, valve, filter, or equipment assemblies. O rings are small but critical sealing parts that help prevent leaks, air intrusion, and loss of pressure when installed in the correct groove or sealing surface. Use part number O 488 when matching this item to an existing component, owners manual, parts diagram, or service record.