The aftermarket Pentair 39010200 Filter Tank Body O-Ring fits the Pentair Clean and Clear Plus cartridge filter and Pentair FNS Plus swimming pool and spa DE filter. This part fits filters manufactured after 2000. This is not a Pentair original replacement part, it is an aftermarket part designed to provide you with a quality cost saving alternative.

If an O-Ring is swollen or cracked it can cause your equipment to suck air and spit air back into the pool through inlets and it must be replaced. Not replacing O-Rings can damage your pool equipment, have a negative effect on filtration and decrease the efficiency of pool chemicals.