Filbur Pentair/Hayward 18" DE Grid Set (7+1) For 36 SqFt Filters (FC-9530)

The Filbur Pentair/Hayward 18" DE Grid Set (7+1) For 36 SqFt Filters is designed for a defined pool or spa equipment application, where performance depends on the interaction of several related components. Properly selecting this version helps preserve the intended operation of the larger system and avoids replacing functioning equipment simply because one part requires service.

DE Filter Grid Function and Replacement

Diatomaceous earth filtration systems use a set of fabric-covered grids to support a fine coating of filter media. Water passes through that coated surface while captured particles remain in the filter until cleaning or backwashing. Full and partial grids can look similar, but their dimensions and position within an assembly must match the original filter configuration.

A worn grid may show split fabric, damaged seams, distortion or broken internal supports. Installing a correctly sized replacement can restore the integrity of an otherwise serviceable grid assembly. During service, inspect the manifold, standpipe, air relief and remaining grids; one damaged component can allow filter media to return to the pool or reduce filtration performance.

Selection and Installation Considerations

Match the grid position and full-versus-partial configuration before replacing individual elements in an existing DE filter set. The specific item reference FC-9530 should be used when checking ordering records, service illustrations and original manufacturer labels. The listed square-foot rating normally describes the complete filter assembly, not the surface area of a single replacement grid. Confirm the exact full/partial arrangement and physical dimensions before purchase.

Useful Features and Service Considerations

• Fabric-covered grid supports a protective DE filter-media layer
• Full and partial grid positions are not interchangeable
• Inspect seams and internal supports during maintenance
• Check the manifold and companion grids before reassembly
• Filter area refers to the complete compatible system
• Use the manufacturer’s correct DE charging procedure

Before ordering: Identify the existing equipment model and compare the connection or mounting arrangement, manufacturer identification and any applicable electrical or safety requirements. This listing is for the particular item identified above, not for an entire system unless the product is expressly described as a complete assembly.