Generic O Ring [25" ID] [17 32" CS] O 486 (O 486) pushpullvalves The LCM fit and included The LCM fit and included plug relationship give this part practical value because wet end housings work best when they match the original pump geometry closely The Waterway 805 0000 main tank body O ring is designed for compatible Crystal Water system applications where sealing around the main tank body is critical The 17 32 inch cross section gives this O ring practical value because extremely large assemblies often require exceptional sealing mass for correct groove fill and compression the assembly can lose the sealing support it should maintain around the full circumference