Generic Tank Body O-Ring [18-7/8" ID] [5/16" CS] (O-498) andersonmfg which is why using the

which is why using the proper replacement matters so much in keeping the spa experience true to its original design

Matching the correct sea-level assembly helps preserve intended combustion support and cleaner service results

Helps restore sealing at the main drain assembly

That makes it practical for more robust service applications

Spring-loaded design for automatic valve response

Generic Tank Body O-Ring [18-7/8" ID] [5/16" CS] (O-498) andersonmfg which is why using theA tank body O ring helps create a seal at a compatible large filter or vessel connection, and this generic version is sized with an 18 7 8 inch inside diameter and 5 16 inch cross section using the O 498 reference. When a large tank seal becomes worn, flattened, or damaged, the housing can lose the sealing support it should maintain. The large diameter heavy profile construction gives this O ring practical value because tank body seals often require