The Attwood 4143-4 750 GPH Shower Sump Pump System provides reliable performance, larger capacity, and simpler installation and maintenance. An air vent to prevent air locks. Slotted mounting feet which allow for quick installation and removal. The Straight mesh filter allows for easy removal and cleaning. Inlets are routed directly into the sump box which allows additional inlets to be added. Water is pumped out of the sump box by Attwood’s proven Sahara pump with self-contained super reliable, mercury-free float switch. Lid easily snaps on and off and includes a gasket to seal the sump box against overflow.