Hayward AquaTrol Above Ground Salt Chlorine Generator 18K gal w/ Return Jet & Twist Lock | W3AQ-TROL-RJ-TL Valve Rebuild Kits Low Profile This part is dark Blue

This part is dark Blue and round and has an opening in the center which allows you to snap it into place on the hose and should sit behind the cleaner

It also locks it into place

Style 1 High Flow Pop-Up Head (Gray) – Pentair In-Floor | SKU 236353

Confirm proper seating and alignment with the sump to ensure optimal debris capture and flow balance

Hayward AquaTrol Above Ground Salt Chlorine Generator 18K gal w/ Return Jet & Twist Lock | W3AQ-TROL-RJ-TL Valve Rebuild Kits Low Profile This part is dark BlueThe AquaTrol is an automatic chlorine generation system with a built in filter pump timer designed specifically for above ground pools. The operation requires a low concentration of salt (sodium chloride) in the pool water at levels low enough that it normally will not be tasted. The AquaTrol automatically sanitizes your pool by converting the salt into free chlorine which kills bacteria and algae in the pool through a process called electrolysis.