Filbur FC-9890 Pool 18" x 17-3/4" Rectangular DE Grid Filter valveparts and this Poolvergnuegen version is

and this Poolvergnuegen version is a black quantity-4 set designed for 2-wheel and 4-wheel applications using the 896584000-655 reference

cleaner hydraulic balance

Matching the correct stainless steel and dark gray crown-style internal helps preserve intended fit and a premium appearance

Useful when the original switch is worn or erratic

Tecmark bellows replacement kit

Filbur FC-9890 Pool 18" x 17-3/4" Rectangular DE Grid Filter valveparts and this Poolvergnuegen version isA rectangular DE grid filter helps form the filtration surface inside a compatible diatomaceous earth filter system, and this Filbur FC 9890 grid is designed in an 18 inch by 17 3 4 inch format for matching pool applications. When the original grid becomes damaged or worn, the filter can lose the dependable debris capture support it should provide. The 18 inch by 17 3 4 inch dimensions and FC 9890 reference give this part practical value because DE