FNS60 DE Filter - New O-Ring too large

[jeremysm1]

My DE filter sprang a leak last night and I lost about 2 feet of water before I saw the leak on the DE filter at the clamp. I replaced the o-ring about 6-weeks ago and noticed that it was slightly too large and am now attributing the issue to that. I picked up a replacement 0-ring and cleaned the heck out of the clasp and area but when I put the brand new o-ring on noticed that it's still seemingly an inch too big. I would say it's loose fitting and it I tighten one side of the o-ring the spillage is noticeable. Is this normal? If so, how am I supposed to get a good seal so this won't happen again? I'll try to attach pictures. I have the Pentair FNS60 and I bought the o-ring aligned to product #39010200

Of course, I'm in the middle of this right now so any quick guidance would be appreciated. Thanks!

 

[jeremysm1]

After calling Pentair and digging on the internet, found out that both of the last two pool stores sold me the wrong part. Needed Pentair 195008 O-Ring Tank Replacement FNS Pool and Spa D.E. Filter. It's more of a triangle shape then round. Just wanted to close the loop--be sure to use your DE part number and serial # for the right part is my suggestion.

 

[Richard320]

After calling Pentair and digging on the internet, found out that both of the last two pool stores sold me the wrong part. Needed Pentair 195008 O-Ring Tank Replacement FNS Pool and Spa D.E. Filter. It's more of a triangle shape then round. Just wanted to close the loop--be sure to use your DE part number and serial # for the right part is my suggestion.

Excellent!

 

[Mayorb]

There has been a lot of confusion about equipment manufacturers naming different equipment with similar, or even identical names.
The FNS was originally a PacFab product, and was purchased by Pentair about 20 years ago.

They also bought out a company called American Products about the same time, their filter was called "Titan".
Pentair discontinued the PacFab FNS line, but continued with the American Products filter, re- naming it the "FNS Plus".

Don't get me started with the 'Kreepy Krauly" name....