Generic Buna-N O-Ring [15-15/16" ID] [5/16" CS] (90-423-6115) leviton An eyeball inlet fitting like

An eyeball inlet fitting like this is useful because it helps return water to the pool or spa while also allowing directional adjustment of the return flow

Helps restore dependable trapped-air release

A return face cover is useful because it helps finish the return opening neatly

Full control system for compatible BP1500 spa applications

Generic Buna-N O-Ring [15-15/16" ID] [5/16" CS] (90-423-6115) leviton An eyeball inlet fitting likeA 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