Filbur Rectangular Diatomaceous Earth [DE] Grid [18" x 9-11/16"] [Center Port] (FC-9820) ametek and pressure-switch support give this

and pressure-switch support give this heater practical value because complete heater replacements work best when they match the original dimensions

A spa may still run perfectly

this wet end helps restore stronger water handling and supports a cleaner

flow characteristics

The 25 square foot rating and 1-1/2 inch slip connection give this filter practical value because correct sizing and connection fit matter in preserving the intended flow and installation relationship of the system

Filbur Rectangular Diatomaceous Earth [DE] Grid [18" x 9-11/16"] [Center Port] (FC-9820) ametek and pressure-switch support give thisA rectangular DE grid helps create the working filtration surface inside a compatible diatomaceous earth filter system, and this Filbur FC 9820 grid is designed in an 18 inch by 9 11 16 inch center port format for matching applications. When the original grid becomes torn, worn, or less effective, the filter can lose the dependable support it should provide. The 18 inch by 9 11 16 inch dimensions, center port configuration, and FC 9820 reference give