Replacing Pentair Nautilus 60 sq ft DE filter

zz28zz

Active member
Mar 26, 2018
37
Austin, Tx
Haven't had any luck finding a good bottom for my cracked one. Looking at newer stuff. I see there are the FNS grid types and the "Quad DE Cartridge" types. Prices are fairly close. Is one better than the other? Do grids last longer than the "DE Cartridges"?

Do these 2 types of Pentair filters use the same multiport valve?
 

HermanTX

Gold Supporter
May 20, 2020
1,566
Katy TX
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You may want to go price the cost of each grid /quad cartridge. That may be a determinant factor for you.
Are you wed to a DE filter or are you open to considering a true (non-DE) cartridge filter. This way you do not need to handle DE nor do you need the multiport valve. Just a thought for you to consider.
 

zz28zz

Active member
Mar 26, 2018
37
Austin, Tx
From what I have read, DE filters down to 5um where cartridges are 15-20um at best. Back flushing with DE sys is cheap. Not sure what non-DE cartridges costs but seems like they would get expensive over time.