By Heather Burlingame, Senior Production Editor | September 28, 2010

StowThe DP-2 and DP-3 self-priming diaphragm pumps clean water, sludge and slurry from excavations, trenches and construction sites. The DP-2 has a maximum capacity of 3,000 gph, and the DP-3 pumps up to 5,100 gph. Other features include a 4-hp engine, heavy-duty aluminum body, lubricated spur gear and automatic oil shutdown.