Filbur Rectangular Diatomaceous Earth [DE] Grid [18" x 19-1/4"] [Center Port] (FC-9850) topsideparts You are not changing how

You are not changing how the spa operates

That makes it practical for regular field service

Union fitting with 2 inch slip or 2-1/2 inch spigot options on both ends

There is no need to replace the entire topside if the internal electronics are still responding correctly

0 HP Ultima Wet End is designed for compatible side-discharge 48-frame applications where the original assembly has become worn or less effective than it should be

Filbur Rectangular Diatomaceous Earth [DE] Grid [18" x 19-1/4"] [Center Port] (FC-9850) topsideparts You are not changing howA rectangular DE grid helps provide the filtration surface needed inside a compatible diatomaceous earth filter, and this Filbur FC 9850 grid is designed in an 18 inch by 19 1 4 inch format with a center port for matching applications. When a grid becomes damaged, worn, or less effective, the filter can lose the dependable support it should provide during operation. The 18 inch by 19 1 4 inch dimensions, center port layout, and FC 9850 reference give