Complete 48 square foot DE filter grid set, eight grids assembled
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DE Pool Filter Grid Replacement Set Complete - 24 sq. ft. (12 in. grids)

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$10099
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Quick overview

  • Complete set, not a single grid seven full size grids plus one partial, eight in total.
  • Five sizes 24, 36, 48, 60 and 72 sq. ft., on grid heights from 12 to 36 in.
  • Reinforced center tube funnels water in from the grid edges and keeps tension off the fabric.
  • Virgin resin polypropylene woven for strength, with no reground filler in the weave.
  • 4-ply chemical resistant stitching on the seams that normally give out first.
Full description and specifications ↓

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Product details

Complete replacement grid sets for diatomaceous earth pool filters, in five sizes from 24 to 72 square feet. Every set is eight grids: seven full size plus one partial that closes the assembly. Pick the size that matches your filter, using the table below to check it against the part number you are replacing.

Each grid is built around a reinforced center tube. The tube acts as a duct, funneling water from the outer edges of the grid into the center and out through the frame. Spreading the draw this way keeps tension off the fabric, which is usually what decides how long a grid set lasts and how hard the pump has to work to pull through it.

The fabric is woven polypropylene made from virgin resins only, stitched with chemical resistant 4-ply thread. Virgin resin matters here: reground material carries impurities that weaken the weave and open up the pore structure, which is how a tired grid starts passing DE back into the pool.

Sizes and part numbers

Filter area Grid height Filbur Unicel Our SKU
24 sq. ft. 12 in. FC-9520 FS-2002 UNI-60-5180
36 sq. ft. 18 in. FC-9530 FS-2003 UNI-60-5181
48 sq. ft. 24 in. FC-9540 FS-2004 UNI-60-5182
60 sq. ft. 30 in. FC-9550 FS-2005 UNI-60-5183
72 sq. ft. 36 in. FC-9560 FS-2006 UNI-60-5184

Choosing the right size

Measure the height of a grid already in the filter, or read the square footage off the filter label. The two go together: 12 in. grids make a 24 sq. ft. set, 18 in. a 36, 24 in. a 48, 30 in. a 60 and 36 in. a 72. The brand on the tank does not decide fit, the grid dimensions do.

What is in the box

Seven full size grids and one partial grid, eight grids total, which is a complete set for one filter. Manifolds, standpipes and clamps are not included. Reuse the ones already in the filter or order them separately.

When to replace a grid set

Replace when DE comes back into the pool through the returns, when the filter will not hold pressure, or when the fabric shows tears, thin patches or a hardened glaze that backwashing no longer clears. Grids are replaced as a full set rather than one at a time, because a single new grid alongside seven worn ones takes an uneven share of the flow and fails early.

Specifications
Brand Filbur
Filter type Diatomaceous earth (DE)
Filter area 24 sq. ft.
Grid height 12 in.
Grids in set 8 (7 full size, 1 partial)
Fabric Woven polypropylene, virgin resin
Stitching 4-ply chemical resistant thread
Center tube Reinforced
DE charge About 2.4 lb
Filbur part number FC-9520
Unicel part number FS-2002
UPC 090164827001
Sold as Complete set
Ships Parcel

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Customer reviews

Questions and answers

What people ask about this product, answered by our pool techs.

Which size do I need?
Measure the height of a grid already in your filter, or read the square footage off the filter label. Grid height and filter area go together: 12 in. grids make a 24 sq. ft. set, 18 in. a 36, 24 in. a 48, 30 in. a 60 and 36 in. a 72. The brand of tank does not decide fit, the grid dimensions do.
Is this the whole set or a single grid?
The whole set, in every size. Eight grids ship together: seven full size and one partial. You do not need to order the partial grid separately.
Does it include the manifold, standpipe or clamps?
No. This is grids only. Those parts normally outlast several sets of grids, so you reuse what is in the filter. If yours are cracked or distorted, order them alongside this set.
Can I replace just the one grid that failed?
You can, but it rarely pays. A new grid sits alongside seven worn ones and takes an uneven share of the flow, so it loads up faster and the set still needs doing shortly after. Replacing all eight at once is the normal service.
How much DE does my filter take?
Roughly one pound of DE per 10 sq. ft. of grid area, so about 2.4 lb for a 24 sq. ft. filter up to about 7.2 lb for a 72. Add it slowly through the skimmer with the pump running after every backwash or teardown, and check your filter manual, since some manufacturers specify their own charge.
How long should a grid set last?
Five to ten years is typical with regular backwashing and an annual teardown and cleaning. Running the filter with a torn grid, using strong acid cleaners too often, or letting the DE charge run low all shorten that considerably.
What is the difference between the FC and FS part numbers?
Nothing functional. FC numbers are Filbur, FS numbers are Unicel, and they are two catalogs describing the same grid set. The table in the description pairs them up by size so you can match whichever number is printed on the grids you are replacing.
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