Waterway Clearwater Union Collar Gasket [2001 & Prior] [5-5/8" ID, 7-1/8" OD] (711-1920) reducers or being replaced as part

or being replaced as part of a full drain rebuild

This replacement is especially useful when the original plug is stripped

and the 4-pin connector format

Heaters like this are useful because they help restore heating performance while preserving the size and electrical characteristics the original system was built around

Waterway Clearwater Union Collar Gasket [2001 & Prior] [5-5/8" ID, 7-1/8" OD] (711-1920) reducers or being replaced as partThe Waterway 711 1920 Clearwater union collar gasket is designed for compatible 2001 and prior Clearwater applications and features a 5 5 8 inch inside diameter and 7 1 8 inch outside diameter. A gasket like this is useful because it helps restore the seal at the union collar while matching the earlier version of the assembly. Older systems often need parts that match their original dimensional profile closely, and using the correct Waterway gasket