DE Grid DIY

Jay Kepps

New member
May 14, 2017
2
Tampa, Florida
I am pretty handy and I have read a few articles about replacing DE Grids. I am wondering if it is as easy as they make it sound? I have a Pentair 24 FNS Plus. Before cracking this thing open, how do I know what size grids to buy? Also, I have no idea how many gallons my pool is but I'm sure there is something wrong with the grids because powder is coming back into the pool. Any advice would be greatly appreciated.

Thank you in advance. -J
 

jblizzle

Mod Squad
TFP Expert
LifeTime Supporter
May 19, 2010
41,450
Tucson, AZ
There is a DE filter cleaning sticky in the pump forum that might help. It is easy, but tricky to put things back together.

I would pull it apart to find the problem before ordering parts.
 

Jimrahbe

Mod Squad
TFP Expert
LifeTime Supporter
Jul 7, 2014
12,090
Bedford, TX
Jay,

Welcome to TFP.. A Great resource for those handy DIY pool owners... :swim:

I would make sure of the model number of your filter before ordering anything. If like others I have seen, it will have a label listing FNS 24, 36, 48, and 60.. In theory there should be a mark on the one you have, but often the mark is gone or confusing.

The filter size (length) is half the number of Sq. feet of the filter.. So, an FNS 24 sq. ft. filter, has grids that are only 12" long.. etc... a 36 sq. ft. filter has grids that are 18" long. So once you get it open you can confirm the model number of your filter.

Thanks for posting,

Jim R.
 

GDN

Bronze Supporter
Oct 17, 2016
308
Dallas, TX
If you are the least bit handy replacing the grids will be easy. Just look and note how they are in as you take them apart. I think most of these are alike and the youtube videos you'll find will point this out, you'll have 8 or so of them and one of them will be different, it will go in a special spot, just note where that one goes. You won't have any trouble at all with the help documents on here and a quick search on the subject for youtube. Spend 30 minutes watching 2 or 3 videos and you are set. For taking apart, cleaning/inspecting and reassembling allow a couple of hours.
 

GDN

Bronze Supporter
Oct 17, 2016
308
Dallas, TX
So after I saw Jim's comment I had to go watch the video - pretty funny and a good set of instructions. The only thing I'd in addition to all of the comments is to start with a backwash and it will remove most of the DE and make opening and cleaning easier if you've already removed a lot of the DE and garbage that has collected in it.
 

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