1 pk Valve Cover o-Ring O-336 35505-1409 35505-1438 354053 Compatible for Pentair Pac Fab Top Mount 1 1/2" 26-1124, 26-1130, 26-2506 and Hayward SPX0714L jacuzzi Seal works for both saltwater

Seal works for both saltwater and chlorine

All o rings that come in contact with fluid will not swell like some of the other kits out there

A-Quality does not swell when exposed to cleaners

326A BF/AI

They are the right length and mesh but do not stay on the check valve when vertical

1 pk Valve Cover o-Ring O-336 35505-1409 35505-1438 354053 Compatible for Pentair Pac Fab Top Mount 1 1/2" 26-1124, 26-1130, 26-2506 and Hayward SPX0714L jacuzzi Seal works for both saltwaterFits Models: VariFlo XL, Magnum R P PC UP, Pac Fab 700 Glas, SwimQuip ABG JW Series, JS Series Available with or without silicone lube used to delay o ring rot and no clogging buildup. Also available as a 2pk to keep a spare on hand. Primarily used on PAC FAB (PUREX TRITON SYSTEMS) TAGELUS FILTERS.