Pentair R172240Z High Capacity Feeder Lid O Ring uv system parts The Pentair U9 375 cover O ring summerbrook The Pentair U9 375 cover O ring is a replacement seal designed for compatible Pentair Max E and Dura Glas pump lids 04 VLR4001 Raised Vinyl Liner Encapsulation Kit Under Guide (UG) (12 x 24) (corners required except 90º) 2019 2 VLR4002 Raised Vinyl Liner Encapsulation Kit Under Guide (UG) (16 x 32) (corners required except 90º) 2019 2 Not sure this is the right part Helps maintain a watertight seal to prevent leaks and equipment damage The Pentair R172240Z Lid O Ring is a genuine replacement part designed specifically for Pentair High Capacity Automatic Feeders