A cast iron diaphragm pump excels at removing muddy water from construction pits. The solids handling ability of a cast iron diaphragm pump allows passage of small stones. Unlike a centrifugal pump, a cast iron diaphragm pump does not clog easily. The suction strainer on a cast iron diaphragm pump keeps out large debris. When the pit is deep, a cast iron diaphragm pump can be placed remotely....