Will you please look at these pics of my filter grids and advise?

dclynds

Well-known member
Apr 29, 2016
84
Houston, TX
Pool Size
17500
Surface
Plaster
Chlorine
Liquid Chlorine
Hi guys. I have a Pentair FNSP 48 filter and ended up ordering a new set of grids after I popped the lid today to clean my current set. Noticed not only weird stains but one grid had a hole which was causing DE to flow into my pool.

Q1: Does the top look normal after removing the lid what with all the buildup?

Q2: What are those stains?

Q3: Is that pressure screen thingy in good shape (it was compressed inward so I popped it out with my finger)?

Q4: Are Unicel FS-2004 filter grids a suitable replacement?

Thanks,
Daniel
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Jimrahbe

Mod Squad
TFP Expert
LifeTime Supporter
Jul 7, 2014
23,486
Bedford, TX
DC,

Your grids look pretty normal to me... Not sure about the stain, but unless your grids are leaking DE, I would not worry about it..

Not sure how you got the nut off the top, but normally you pull all the grids out as one assembly... and then disassemble it, so you can get a wrench on both ends...It would be impossible for me to reassemble the unit without out taking it out... I find it hard enough doing it upside down and I have done it dozens of times...

Thanks,

Jim R.
 
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