Disconnect the union at the pump and at the filter. Unscrew the union from the filter and clean and lubricate the oring.
Zodiac Bulkhead Assembly w/ O-ring - R0465600 - INYOPools.com
BULKHEAD ASSEMBLY WITH O-RING (R0465600) - Pool & Spa Partswww.inyopools.com
Yes !! It took me 5 years of reassembling my equipment each spring to realize that my ‘hand right’ was equal to the PB’s ‘hand tight plus 1/8th turn’. I made many drips that needed redoing in the meantime. Once I stopped overthinking it I was fine. A little under is fine and if it drips you can tighten it just a hair more. If you go too far it will start dripping more as you tighten too much. If you put it together and it doesn’t drip, walk away slowly.Mostly hand tight and maybe a little bit more. Don't overdo it
Ok great !! Just making sure we were all seeing the same thing.This part screws into the filter. The leak is probably at the O-ring.