Shop All-Flo™ MAX-PASS AODD Pumps
All-Flo™ MAX-PASS pumps (the S Series) are engineered for media that other pumps choke on — slurries and solids-laden fluids that need a large solids-passage design. Built to move challenging media with reduced clogging, MAX-PASS is a strong fit for wastewater, mining, and abrasive or chunky transfer duty, while keeping All-Flo's simple, easy-to-maintain construction. The PSG® Store ships these pumps factory-direct with genuine All-Flo parts. Browse the MAX-PASS range below, or filter by body material, diaphragm, and flow rate to spec the right pump for your solids handling.