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 7/19/2018 by SD

Will these filters fit on my Nautilus DE Filter NSS-48?

A     Answered on 7/19/2018 by InyoPools Product Specialist Kevin G.

Hello, yes this would be the correct full grid for your filter. 

?     Asked on 6/20/2018 by

Will this fit American products 584090?

A     Answered on 6/20/2018 by InyoPools Product Specialist Lennox H.

Hi. Yes, these are the correct size grids for the American Products 584090 filter.

?     Asked on 5/13/2018 by Kelly

How much is total 8 catridges ? Shopping for full 7+1 . Please email me total package. Thank you

A     Answered on 5/14/2018 by InyoPools Product Specialist Lennox H.

Hi, Kelly. The 48 Sq.Ft. Grid Pack (7 Full&1Partial) - FG1004PACK is the link to all 8 Grids. 

?     Asked on 11/4/2017 by Angela

I have a Pentair FNS Plus Filter with FNSP 48 grids. Besides the one partial grid that's smaller, are the other 7 all of the same size and can be installed interchangeably?

A     Answered on 11/6/2017 by InyoPools Product Specialist Lennox H.

Hi, Angela. The 7 large grids are all the same which is Item # FG1004 and the Small grid is Item # PG1904. We have the 48 Sq.Ft. Grid Pack (7 Full&1Partial) - FG1004PACK which includes all 8 grids. 

?     Asked on 8/20/2017 by Laurent

Hello, will this DE grid fit with ASTRALPOOL Clarity 48 filter (dimensions seem to be similar) ? Is shipping to France possible? Thanks.

A     Answered on 8/21/2017 by InyoPools Product Specialist Lennox H.

Hi, Laurent. Yes, these grids will fit the Astral Clarity 48 DE filter. We can haves these grids shipped to France, please provide the shipping address for a quote. 

?     Asked on 8/8/2017 by Craig Peddicord

I have an older model micro clear DE filter 48 sq ft. The diagram shows 7 full grid required, however my filter has 8. Will these grids work in my filter?

A     Answered on 8/9/2017 by InyoPools Product Specialist Alex V.

Craig, There are 7 full and 1 partial grid for that filter. You would want the FG1004PACK. That would give you the set of all 8 grids. 

?     Asked on 8/1/2017 by

Will this DE grid fit a De Hayward model 4820 pro-grid pool filter?

A     Answered on 8/2/2017 by InyoPools Product Specialist Alex V.

hello, Yes, this will fit a Hayward DE4820 filter. 

?     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 InyoPools Product Specialist 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 InyoPools Product Specialist 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 InyoPools Product Specialist 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 InyoPools Product Specialist 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 InyoPools Product Specialist 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 InyoPools Product Specialist 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 InyoPools Product Specialist 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 InyoPools Product Specialist 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 InyoPools Product Specialist 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 InyoPools Product Specialist 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 InyoPools Product Specialist 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 InyoPools Product Specialist 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 InyoPools Product Specialist 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 InyoPools Product Specialist 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 InyoPools Product Specialist 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 InyoPools Product Specialist 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 InyoPools Product Specialist 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 InyoPools Product Specialist 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 InyoPools Product Specialist 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 InyoPools Product Specialist 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 InyoPools Product Specialist 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 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 InyoPools Product Specialist 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 InyoPools Product Specialist 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 InyoPools Product Specialist 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

1     0

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

1     0

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)
33 Rating
5 star:
4 star:
3 star:
2 star:
1 star:

The Most Helpful Review

The Most Recent Reviews