48 Sq. Ft. Full Grid 24" (7 Required) - FG1004



Part # FG1004

  4.85 Average  



Part # FG1004

Dimensions 24" L x 12" W x 6" D

Alternate Part #'s 192188, 59002400, DEX4800DA, R0555000

Product Description

Time to Replace Your DE Grids?

Our DE Grids are used on the most common pool filters including American Products, Pentair, Hayward & Pac-Fab. Most DE Filters will require 7 Full Grids and 1 Partial Grid. Typically DE grids last about 5 years so if it has been longer than 5 years than now is the time to replace your DE grids.

Things to Consider When Replacing Your DE Grids

  • Most DE Filters Require 7 Full Grids & 1 Partial Grid
  • DE Grids Normally Last 5 Years
  • Commonly Used on Hayward, Pentair, Pac-Fab and American Products

Note: Collar has open slot (2 notches). Length is measured from one end of the grid to the other (collar not included).



Product Specifications

Grid Length:
24 in.
Grid Width:
11 - 1/2 in.
48 sq. ft.
24 in.
11 - 1/2 in.
Commonly Used On:
American, Hayward, Pac-Fab, Pentair, Sta-Rite
Partial Grid:

?     Asked on 5/15/2017 by Peter

Hi, I have an old Sta-Rite Posi-Flo 48 sq ft model #74548 DE filter with the manifold at the bottom. Is the Unicel FG-1004 a suitable grid for this filter. It currently has 8 Unicel Full grids but I can't find the grid model number. Thanks

A     Answered on 5/18/2017 by Lennox H.

Hi, Peter. I was not able to locate any info on a Sta-Rite Posi-Flo DE filter 74548. If you can please send pictures of the unit to upload@inyopools.com.

?     Asked on 5/11/2017 by Evgenij Lorents

Hi Guys! Your parts compatible my filter model N Clarity DE-48 (Astral Pool), end can you send me to Russian Federation? Me need 2 pc.

A     Answered on 5/12/2017 by Lennox H.

Hi, Evgenij. This 48 Sq. Ft. Full Grid 24" - FG1004 will fit the Astral Pool Clarity DE-48 filter. We can ship this item to the Russian Federation. Please reply with your shipping address.

?     Asked on 4/30/2017 by jerry

will D E filter #FG1004 work in place of PFG2448? I have a nautilus tank #ns48

A     Answered on 4/30/2017 by Stacey M.

Hello Jerry, Yes these will work If you just want the all grids for the FNS48 it is part number FG1004PACK, if you want the grid assembly with it already assembled that is part number 59023400.

?     Asked on 4/26/2017 by Gene Williams

for a pentair 48 inch filter p/n 180008 what is the cost for all the grids.

A     Answered on 4/26/2017 by Scott W.

If you just want the grids it is part number FG1004PACK, if you want the grid assembly with it already assembled that is part number 59023400.

?     Asked on 3/18/2017 by Ed

I am changing the grids in the pool filter . the open slot in the filter is in the bottom not on top .would it work .please let me know ,appreciate your assistance .thanks

A     Answered on 3/20/2017 by Lennox H.

Hi, Ed. These are not the correct grids for your filter. if you can provide us with the model number to your filter we can locate the correct replacement grids.

?     Asked on 1/31/2017 by Richard Kloc

who makes this grid?

A     Answered on 1/31/2017 by Scott W.

The manufacturer is Unicel.

?     Asked on 8/1/2016 by Craig

I have a Hayward DE 480 S . would your 48 DE grids fit this filter?

A     Answered on 8/5/2016 by Lennox H.

Hi Craig, this 48 sqft full grid will fit the Hayward DE 48 filter. If you need to replace all 8 grids you can purchase the 48 Sq. Ft. Grid Pack (FG1004PACK).

?     Asked on 6/16/2016 by jim

will the FG1004 and FG1048 interchange? Will they install in the base?

A     Answered on 6/16/2016 by Lennox H.

Hi Jim, The FG1004 and FG1048 are not interchangeable.

?     Asked on 6/13/2016 by Rick Verlander

I have a 15 yr old Nautilus INS Pac Fab 48 DE filter. Works great. Also own new set of fins for it. After last cleaning now dripping from lower piping assembly underneath/within the skirt/housing below the tank. I think it is probably just o rings etc on that lower piping assembly. 1. What would I need to purchase? Try this first? OR 2. If I buy a new Pentair FNS Plus D.E. Filter, will I be able to use the whole new set of fins I already have for the Nautilus INS Pac Fab 48 DE filter

A     Answered on 6/14/2016 by Patrick P.

Hi Rick, I would first start off by replacing key # 26, 31 and 32 located on the Pac Fab Nautilus INS Parts Break Down Page. If you do end up going with a complete FNS Plus 48 Filter then the individual grids will work from the INS to the FNS Plus but the top and bottom manifold are different. So if you have a pre-assembled grid pack you will need to remove the grids.

?     Asked on 6/11/2016 by David

Is this the right part for the filter formerly called the Nautilus FNS 48

A     Answered on 6/12/2016 by Patrick P.

Hi David, Yes this is the proper replacement DE Grid Pack for your Nautilus FNS 48 Filter. We also have a Video on How to Replace your DE Grids which you may find helpful.

?     Asked on 6/7/2016 by HD

I have a Hayward PRO-GRID D.E. Filter DE4820 and need to replace all of the filters inside. What all do i need to order?

A     Answered on 6/7/2016 by Hector F.

You can replace all the grids which would be part number FG1004PACK and or the complete grid assembly being part number 4810-65A.

?     Asked on 5/30/2016 by bob

do you have this grid with just a notch in the middle of the outside of the curve.Or an adapter to put over the middle slot which will make it one notch on the outside

A     Answered on 6/2/2016 by Lennox H.

Hi Bob, We have specific grids for different filters, if you can provide us with the model of your filter we can verify which grids you need.

?     Asked on 5/26/2016 by sean

hi, how much earth do i add to the grid filter triton plus nsp nautilus. 30k gallons/ i removed my grids to clean filter after opening. a lot of water was retained in the grids it was dripping out very slowley. is that normal or do you think i have and issue. and last when i move the lever around on the port valve is no longer sits in the groove it lind of drops trhe hanle back and the sits out of the groove in the front. thanks, sean

A     Answered on 5/27/2016 by Patrick P.

Hi Sean, This article does a great job on explaining How Much DE Filter to Add to your Pool Filter we also have a Video on How to Add DE Powder to your filter you may find helpful. Also here's a Video on How to Backwash a DE Filter and a Video on How to Remove DE Grids and Do a Full Cleaning.

?     Asked on 5/8/2016 by Jim

Will the FG1004PACK fit a Hayward DE-480S filter?

A     Answered on 5/10/2016 by Lennox H.

Hi Jim, The FG1004PACK will fit a Hayward DE-480S filter.

?     Asked on 2/28/2016 by gary

I have a Hayward DE4800 filter. Will this grid panel fit? Thanks

A     Answered on 2/29/2016 by Lennox H.

Hi Gary, The 48 Sq. Ft. Full Grid will fit into the Hayward DE4800. If you need to replace all 8 grids I would recommend getting the 48 Sq. Ft. Grid Pack (FG1004PACK).

?     Asked on 2/11/2016 by John

What grids do I use for my Crystal Water Waterways 48 seriel D105268 filter?

A     Answered on 2/12/2016 by Megan C.

The Waterway Crystal Water DE Filter Parts requires 7 full grids and 1 partial. Replace with Grid DD 48 Sq Ft 7 Required (818-3910) PART# 4742-103 click here to view. The partial Grid, DE Short 48 Sq Ft Single (818-3900) PART# 4742-100 click here to view. For other parts available please click here to view the schematics of the filter.

?     Asked on 9/8/2015 by S D

I have Jandy Pool/Spa Filter Model : DEL48 I want to get the complete grid set Which one will fit my filter , & do you have to purchase them seperate , Or do you have them all in one complete set ?

A     Answered on 9/14/2015 by Lennox H.

Hi SD, The 48 Sq. Ft. Grid Pack (7 Full & 1 Partial) (FG1004PACK) would be the complete grid pack for your size filter.

?     Asked on 9/5/2015 by Gus

Hello, my filter model # is 57025000, S/N 001186. I need one partial grid and 7 full size grids but what part/model of grids do I need and can I order them from you? Thank you very much.

A     Answered on 9/10/2015 by Lennox H.

Hi Gus, The 48 Sq. Ft. Grid Pack (7 Full & 1 Partial) (FG1004PACK) will consist of all 8 grids and will fit into your 57025000 model filter.

?     Asked on 8/16/2015 by Dan m

my filter Pyrex triton 5048 7 full grids 1 partial 36" circular 48" vertical what cartridge kit is needed"

A     Answered on 8/21/2015 by Lennox H.

Hi Dan, The 48 Sq. Ft. Grid Pack (7 Full & 1 Partial) will be the correct grid pack you will need.

?     Asked on 7/23/2015 by Tim

I was wondering if these grids will fit my filter. Waterway Crystal Water Filter, DE 48 Sq Ft, Model: 570-0048 Thanks

A     Answered on 7/23/2015 by Hector F.

These are not the correct grids for the Waterway Crystal Water D.E. filter model 570-0048. There is a smaller 48 sq. ft. grid part number 4742-100 and the larger grid part number 4742-103. This model takes 7 of the large grids and 1 of the smaller grid.

?     Asked on 7/2/2015 by

I have a Pac-Fab Nautilus FNS 24 filter. Which of the grids will replace the current grids?

A     Answered on 7/2/2015 by Dennis R.

The Pac-Fab Nautilus FNS 24 filter has 8 grids all 12" long: you will need 7 full grids (FG1002) and 1 partial grid (PG1902). Prices shown are for each grid.

?     Asked on 4/21/2013 by Guest

How do the FG1004PACK grids compare to the grids that originally came with my filter?

A     Answered on 4/21/2013 by Patrick P.

The FG1004PACK are just as good as the grids that come with the filter. Filter manufacturers don't make the grids, they are actually made by either Unicel or Pleatco.

?     Asked on 12/20/2012 by Guest

I need to order replacement grids for my d.e filter but I'm not sure which ones to order. How do I know which one is the right one?

A     Answered on 12/20/2012 by Patrick P.

The easiest way to figure out the correct grid would be to measure the length and width and compare it to the measurements we have listed on the product page.

?     Asked on 9/14/2012 by Guest

What is the micron rating for a Unicel element?

A     Answered on 9/14/2012 by Patrick P.

All Unicel elements & grids have a 20 Micron Rating.

?     Asked on 5/25/2012 by Guest

Is this the correct grid for my Nautilus NS48 DE tank?

A     Answered on 5/25/2012 by Patrick P.

Yes these are the correct DE grids for the Nautilus NS48 DE tank


Est. Repair Time

Less than 1 hr

Tools Needed

Socket Set

Broken grids

Written on 3/7/2017 by Guest

This replacement was pretty easy I just removed my original old broken DE grids and replaced with the new grids. Up and running in no time at all with crystal clear water.

Were these instructions helpful? 


Est. Repair Time

2 to 4 hrs

Tools Needed

Wrench Set, Adjustable Wrench

Replacing Hayward DE-4820 DE filter grids

Written on 11/7/2016 by Guest

When I removed the old grid assembly it was totally caked with old DE dirt. Even after back washing. This is the first time disassembling. Brought home about a year ago. Ordered new grid due to DE dirt being pumped back into pool. Wish you offered a complete kit with all 8 grids. Did not understand what a partial grid was until I disassembled the filter unit. Partial means one of the grids a smaller. So I did not order the partial grid. Will have to order this part and disassembly filter again to install this part. Could not find clear instruction on reassembly of grids. Figured it out after about 1/2 an hour. Need to assemble it upside down. And the grids need to start outside of the bottom filter locator circle. There is this molded in circle in the filter locator. The tips of the filter need to be outside of this circle. For the grid to fit properly.

Were these instructions helpful? 


Review Summary

  (Average 4.85 out of 5 stars)
32 Rating
5 star:
4 star:
3 star:
2 star:
1 star:

The Most Helpful Review

8     0

 (5 out of 5 stars)  De Grids

from Bridgeview, Il ()

Pros: exactly what we needed

Cons: none

we looked all over for the parts for our filter. We have had it since 1985! the description off the parts as well as the fast shipping was awesome

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The Most Recent Reviews

 (5 out of 5 stars)  D.E. Filter Grids: OEM, great price, on time

from Sacramento, California ()

Pros: On time, OEM, super price

Cons: None

To be honest I had some trepidation because of some less than stellar reviews. But the price was irresistible. The fileters were shipped same day as promised, arrived within 5 business to Calif. as promised (with the FREE shipping), and were OEM filters in perfect condition. And I saved a boatload of money over other online sellers and my local pool supply. I will definitely use them again.

Was this review helpful to you? 

1     0

 (5 out of 5 stars)  Exact original manufacturer part

from Leesburg,Va ()

Pros: exact fit and performance

Cons: none

1/2 the price I paid at the local swim shop-original part from manufacturer--that's all there is to say.

Was this review helpful to you? 

1     0

 (5 out of 5 stars)  Replacement Grid

from Southern Cal. ()

Pros: Price, fit and form.

Cons: Wait for delivery, plan for delivery time.

Great price and service.

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1     0

 (5 out of 5 stars)  Great Grid

from Uniontown, Ohio ()

All of our grids were old and tore and it was difficult to keep the pool clean. It was great to receive these grids and we are having an easier time in keeping the pool clean. The on-line ordering was easy and product was received within the time specified.

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 (5 out of 5 stars)  Good product

from 93505 ()

Pros: Fits fine

Cons: None

This is a good product.

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 (4 out of 5 stars)  no trouble installing replacement

from Dallas TX ()

Both full and partial are compatible with my filter (Hayward DE-4800) and had no trouble installing them. Shipping is prompt. Quality needs time to tell.

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1     0

 (5 out of 5 stars)  48 sq ft full grid


Pros: priced very well and fast

This grid was exactly what i had been looking for and the web site was easy to find what i needed. I had DE leaking into my pool through a hole in one of the grids. After replaceing the damaged grid the problem was solved. Perfect fit, great price and fast delevery!

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