Need help with part ID for Pentair FNS Plus DE Filter.

[cruzmisl]

Hi All,
I developed a leak at the main drain of my filter and am having a hard time finding the correct one online. My particular filter has a cap style drain (threads on the inside) whereas pool plaza shows the part as a plug (threads on the outside). Any ideas? Could I just use some Permatex #2 to seal it or should I get a new cap and Oring?
Thanks,
JOE

 

[waste]

Hey Joe, good to see you

The permatex may well work, but I'd take the cap to a good plumbing store and see if they can match it.

Also, there should be a gasket in it to seal it, check yours out

 

[cruzmisl]

Thanks! Its been a while- a long winter There is an O-ring in there but it doesn't seal any longer. I tried teflon tape but it doesn't work well. I always found the permatex #2 to work much better. I just don't really want to gum up the threads but I guess it shouldn;t really matter. The #2 should clean up well with acetone I guess if I had to clean it for some reason.

 

[PoolGuyNJ]

Clean threads are a must. Getting all the old DE and Teflon out will make life much easier.

I use a toothbrush with the handle broken off to clean the threads before threading the drain cap. I then apply a turns of Teflon tape. The thread size is 1-1/2" NPT (National Pipe Thread). A Hayward 1022C pipe plug fits but can be a bit a PITA to get tight or loosen when used instead of the Pentair version.

I don't recommend the use of any other sealant other than Teflon tape for this application.

Scott

 

[waste]

I don't even recommend the teflon! It's the gasket, kept secure by good threads, that makes the positive seal needed on a pressurized filter, you sure as Heck don't want that puppy leaking or blowing off.

 

[PoolGuyNJ]

Gaskets often get cracked with age. Rather than strip the gasket off a 1022C pipe plug, a little teflon usually saves the day.

Scott