S-Series and P-Series Lift Optional Rear Drop-in Anchor filter-length_16 1/8 inches It is used for Bromine

It is used for Bromine testing in Taylor Kits

If your pool is using salt water for sanitization

Light Premier

It fits both the 21 and 30 inch heads

The Chemtrol PC5100 dual controller operates like a computer with full-screen displays and direct access to all menus and submenus

S-Series and P-Series Lift Optional Rear Drop-in Anchor filter-length_16 1/8 inches It is used for BromineThis is a S Series and P Series Optional Rear Drop In Anchor. This anchor is not required but can be used to attach the rear of the pool lift to a newly constructed or existing concrete deck. (This is a round anchor.) There is a in the S Series and P Series base dedicated for this anchor should you want to use it. It provides extra security and is fairly easy to install.