Pentair 59023300 Complete Element Grid Assembly – 60 sq ft D.E. Filter

The Pentair 59023300 is a full, drop-in replacement grid assembly for Pentair 60 sq ft vertical-grid D.E. (diatomaceous earth) filters. It restores filtration performance by replacing all internal grids, the manifold, and connecting hardware in one complete unit. Ideal for filters with worn, torn, or clogged grids that can no longer be effectively cleaned.

Key Features

• Factory-assembled replacement — includes all grids, manifold, and tie-rod hardware.
• Provides 60 sq ft of total filtration area for efficient debris capture.
• Restores proper flow and pressure when old grids have become damaged or compacted.
• Drop-in installation — no need to assemble individual grids.
• OEM fit ensures correct alignment and consistent D.E. distribution.

Specifications

• Manufacturer: Pentair
• Part Number: 59023300
• Filter Type: Vertical-grid D.E. filter (complete internal assembly)
• Filter Area: 60 sq ft
• Includes: Top manifold, bottom manifold, seven full grids, one partial grid, tie rods, and internal hardware
• Compatibility: Pentair FNS Plus and other Pentair 60 sq ft D.E. filter housings

Installation & Use Notes

Remove the old grid assembly from the filter tank, clean the tank thoroughly, and ensure the tank O-ring is in good condition. Insert the complete new assembly, making sure the manifold seats correctly. Reassemble the tank and recharge with the proper amount of D.E. powder. This restores filtration efficiency, improves water clarity, and helps maintain proper system pressure.

Maintenance Tips

• Backwash and clean the grid assembly as recommended, but replace it when grids show tears, fraying, or heavy deformation.
• Inspect the manifold and tie rods regularly to ensure all parts remain secure.
• Replace the tank O-ring if you experience any leaks during reassembly.