The Shark grinder pump line from Zoeller Pump Company has cutter blades at the intake that grind all passing materials into fine pieces. The cast iron, automatic and non-automatic grinder pumps are available in 1/2 (803), 3/4 (805) and 1 hp (807) units, with integral vertical switch, non-automatic and preassembled package systems. 800/928-7867; www.zoeller.com.