The high-volume DD-6 double diaphragm pump from Myers Seth Pump has long runtimes and is easy to maintain and operate. It can be used for wellpointing, ponds, sludge, sewage and handling solids up to 4 inches in diameter. It is difficult to clog and is self-priming, with head pressure of 135 feet and a flow rate of 475 gpm. It can run up to 10 days on 65 gallons of fuel. Its industrial engines can be repaired in the field easily. 904/389-6114; www.myersseth.com