Our Diesel Powered Double Diaphragm Pumps are built by Thompson Pump Manufacturing in Port Orange Florida specifically to the Blue Tank and Pump Spec. The 4D Double Diaphragm pump is a dry prime pump capable of up to 140 GPM, 30 psi/ 50’ of TDH. These pumps are excellent for any application where Silt, Mud, Sand or Contaminated water are present and are capable of passing a 2” solid. With its 6.3 HP air cooled Hatz engine these pumps are very fuel efficient and easily capable of running 24 hours.