Pentair Grid Assembly for FNS Plus 60 | 59023300

Pentair SKU: 59023300
Pentair Grid Assembly for FNS Plus 60 | 59023300 - Pool Filter Parts - img - 1
FNS Plus 60 D.E. Filter Not sure it fits? See this part on the interactive diagram FNS Plus 60 D.E. Filter

Pentair Grid Assembly for FNS Plus 60 | 59023300

Pentair SKU: 59023300
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$369.99
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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.
Questions about returns? View our return policy.

Hours Of Operation:

Monday - Friday: 7:00 am to 5:00 pm Phoenix Time

Saturday: 8:00 am to 2:00 pm

Sunday: Closed

  • We do not ship on Saturday or Sunday.
  • Orders totaling more than $300 will require signature confirmation upon delivery.
  • We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
  • Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
  • Expedited shipping options are available at checkout.

Return Policy:

  • Products that are received damaged will receive a refund in store credit.
  • Most products are eligible for return within 30 days of receipt, except where noted below.
  • To initiate a return, please complete an RMA form prior to sending your item back.
  • Original shipping costs are non-refundable and will be deducted from the return credit.
  • Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
  • Some returns will be charged an automatic 15% restocking fee.
  • We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
  • Please complete the return form to receive your RMA number and return shipping label.
  • Chemical products are not eligible for return under any circumstances.
  • The Pentair Colorsync 618031 is not eligible for return.
  • Pool cleaners are not eligible for return.
  • Opened seals and o-rings are not eligible for return.
  • Capacitors are not eligible for return.
  • Plastic popup tools are not eligible for return.
  • Automation components and circuit boards are not eligible for return.
  • If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
  • Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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