Pentair IntelliChlor Sanitizer Pass-Through Cell For Winter or Start-Up | 520588 Spa Therapy Jets and Air Mufflers They use the same high-grade

They use the same high-grade rubber materials used for the original factory part

inspect the lid itself before reinstalling the new O-ring

secure replacement to avoid compatibility issues

Polaris 3900 Sport Pressure Side Cleaner (F6)

Pentair IntelliChlor Sanitizer Pass-Through Cell For Winter or Start-Up | 520588 Spa Therapy Jets and Air Mufflers They use the same high-gradePentair 520588 IntelliChlor "dummy" Bypass Cell for Winter or Start Up when the cell is not in use. Protect your IntelliChlor salt cell from cold weather, and start up chemicals by replacing it with the "dummy cell". This will also extend the life span of the salt cell.