When should a DE Cartridge filter be replaced?


LifeTime Supporter
Sep 2, 2007
Richmond, TX
Is there any signs (besides visual tears) or lifetime expectancy to determine when to replace the cartridge filters for a DE filter?

My filter is a Pentair Quad DE 80 Filter.


Bama Rambler

Mod Squad
TFP Expert
LifeTime Supporter
Jun 22, 2009
SouthWest Alabama
Tears or holes are the number one reason to replace them but when the cartridges have a higher than normal psi rise after a chemical cleaning means that the pores are permanently clogged and replacement should be considered.


Jul 21, 2010
Alexandria, VA Zone 7
I just closed my pool and when I opened up my DE filter I was surprised to find lots of DE still inside. I had not taken the filter apart for 4 years, but I am glad I did this year. I did not see any tears, but I noticed a dark tan color to the previously white colored mesh. Is this something I should be concerned about? I too am wondering if I need to replace the guts of my Pentair FNS 60.



Well-known member
May 11, 2010
Dallas TX
soak away! those things should last a long time. My folk's is 20yrs old and working fine. Chemcially cleaned only a couple times.

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