The Dreaded DE Leak

[Cymetrix]

I figured I’d seek advice before shelling out for replacement grids and manifold.

I am having DE coming back into the pool almost immediately after adding it. Here’s where I am at so far:

-I pulled the filter and don’t see any damage to the grids or manifold
-I went ahead and replaced the multi-port gasket in case the issue was there
-I replaced and lubed the standpipe o-ring

I got concerned at first that it was the multi-port because the screen filter on my PSPC kept getting clogged as well. I figured that was the only real way to get solids by once I thought the filter looked ok. Oddly since replacing it, the handle to the MP doesn’t seem to have tension until it is pushed all the way down now. Not getting any leakage in the waste line, but maybe I screwed up the gasket install??

Any thoughts here before I bite the bullet and order new filter grids and manifold?

When I add DE I mix with water and add slowly. I had just cleaned the filter with the hose so I used the 6lbs needs for my FNS Plus, so I don’t think it was operator error. And yes I wasn’t on recirc haha (I’ve done that before).

Less important question, but the filter manifold on my FNS Plus does not have the air relief tube, but just a section with 10 or so tiny holes. Is there maintenance to be done there? Is the tube design better?

 

[HermanTX]

It is always tricky to seat the filter grids into the manifold. Always double check that
Also, a small crack in manifold may not be visible when disassembled but opens up when pressured up. Do a fine scan of the manifold when it off of the grids.

On MPV - always rotate in one direction to move between points. You may want to try that again just to make sure all is seated.

I have the air relief tube so cannot say if that is better or worse then the matrix relief you described.

 

[mktee]

Have you checked the bottom mesh of the grids to see if it has separated? This just happened to me on a <2 year old FNS Plus 60. I just posted an update.

Grid failure on Pentair DE filter - Causing DE Leak [Update]

I just encountered the exact same issue (link to original post below) on a

www.troublefreepool.com

 

[1poolman1]

I figured I’d seek advice before shelling out for replacement grids and manifold.

I am having DE coming back into the pool almost immediately after adding it. Here’s where I am at so far:

-I pulled the filter and don’t see any damage to the grids or manifold
-I went ahead and replaced the multi-port gasket in case the issue was there
-I replaced and lubed the standpipe o-ring

I got concerned at first that it was the multi-port because the screen filter on my PSPC kept getting clogged as well. I figured that was the only real way to get solids by once I thought the filter looked ok. Oddly since replacing it, the handle to the MP doesn’t seem to have tension until it is pushed all the way down now. Not getting any leakage in the waste line, but maybe I screwed up the gasket install??

Any thoughts here before I bite the bullet and order new filter grids and manifold?

When I add DE I mix with water and add slowly. I had just cleaned the filter with the hose so I used the 6lbs needs for my FNS Plus, so I don’t think it was operator error. And yes I wasn’t on recirc haha (I’ve done that before).

Less important question, but the filter manifold on my FNS Plus does not have the air relief tube, but just a section with 10 or so tiny holes. Is there maintenance to be done there? Is the tube design better?

Your manifold is an aftermarket replacement, probably a CMP brand. They are very good. Be sure that all the grids a properly seated in the manifold and that the nuts on the rods are snug to keep the assembly together but not too tight so as to deform the manifold.