Custom Duplex/Triplex Mud Pump/Mud Cleaning System Manufacturing Thunderbolt Duplex/Triplex Hydraulic-Powered Mud Pumps Mono - 7 1/2 x 16 - 184 GPM Duplex - 7 1/2 x 16 - 368 GPM Triplex - 7 1/2 x 16 - 550 GPM Image:  Image:  Image:  Image:  Image:  7 1/2 x 14 320 GPM x 600 PSI 52" W x 92" L x 42" H 3200 Lbs. Trailer Mounted