BestNest Cal Pump PWM2600 Waterfall Pump and Prefilter, 3525 gph Submersible, magnetic drive pump with prefilter Pump can easily power medium waterfalls Prefilter attaches to the bottom inlet, protecting it from debris Side outlet accommodates 1.5" MNPT fittings Pump can push up to 2640 gph at 0' of head height