Pentair 59023500 Complete Element Grid Assembly Replacement 36 Square Feet FNS Plus Pool and Spa D E Filter

Buying guide: FNS Plus grid assembly

This listing identifies a Pentair PacFab FNS Plus filter grid assembly for the 36-square-foot application. Use it when your existing filter uses that same style of grid assembly, not when you only need replacement grids or cartridge elements.

Check whether your service requires the whole internal assembly or only individual grids; matching the old part style matters more than a similar-looking grid.

Compatibility checks

• Confirm the tank label and model show an FNS Plus filter.
• Verify the old assembly covers 36 square feet rather than a smaller or larger size.
• Compare the listed physical size and connection style before installing.

The part/model number shown is 59023500. If your filter uses a different grid count, tank size, or older design, do not assume this assembly will substitute; always check the original equipment part number first.

Do not confuse this with cartridge elements for Clean & Clear filters; grids and cartridge elements are different replacement types.

Pentair grid assembly listing