Intermatic 4 Light Connection Pool & Spa Junction Box | PJB4175 Brushes It has an opening through

It has an opening through the middle intended to allow dirt and debris to be pushed through and out into the filtration system

and helps keep your water clear with less effort

Pentair 2" / 2

Replace your Pentair System 3 S7M120 filter with the OEM 170145 cartridge pack

Intermatic 4 Light Connection Pool & Spa Junction Box | PJB4175 Brushes It has an opening throughThese polymeric junction boxes are code compliant and provide safe, reliable connections for low voltage lights. Specially designed for pools, pool spa combinations, and landscape applications. Junction boxes are for outdoor use only. Features: Accommodates flexible cords and non metallic conduits from " to 1" Watertight, multi fixture enclosure Easy access ground bar PA114 Wall Post Mounting Bracket (sold separately) Complies with NEC Code 680. 24