Raypak 185/207A/206A/R185A/R185B O-Ring Kit [Qty-2] (006713F) magicplastics and FC-9820 reference give this

and FC-9820 reference give this part practical value because DE grid replacements work best when the new component matches the original filter size and internal layout closely

Helps restore more stable and dependable water heating

Air button with 1-5/16 inch size in white finish

The Magnum fit and 2 inch relationship give this part practical value because structural wet-end components work best when they match the original pump geometry closely

Without it

Raypak 185/207A/206A/R185A/R185B O-Ring Kit [Qty-2] (006713F) magicplastics and FC-9820 reference give thisThe Raypak O ring kit is designed for compatible 185, 207A, 206A, R185A, and R185B heater applications where the supported sealing points need fresh O rings. An O ring is useful because it helps maintain leak protection between joined components, supporting cleaner reassembly and more dependable heater operation. This replacement is especially useful when the original seals are flattened, brittle, leaking, or being disturbed during service. A two