Commander Cartridge Filter O-Ring Kit Custom Backstroke Flag Color/Letter Color/Number/Letter (2 sided) It works in conjunction with

It works in conjunction with alkalinity and pH

This is a Hayward Skim Vac II Vacuum Plate for 1-1/2 inch Straight Adapter

or a vinyl lined pool

To accommodate nearly any size pool

Directions for Adding DuraChlor Alkalinity Increaser to Your Swimming Pool:

Commander Cartridge Filter O-Ring Kit Custom Backstroke Flag Color/Letter Color/Number/Letter (2 sided) It works in conjunction withThis o ring kit is designed for the American Products Commander Cartridge Filters. It includes a tank o ring, air relief o ring and drain plug o ring. This kit has been manufactured by a Poolweb partner in accordance with OEM specifications and are designed to meet or exceed specifications.