Double Diaphragm Pump (4”)
Mud Pump Pumping Mud
Mud Pump Pumping Mud

Double Diaphragm Pump (4”)

The Double Diaphragm (DD) series pump is one of our company’s signature pumps and is the first pump we began manufacturing. Our patented Double Diaphragm pump has become a staple with site and utility contractors across the United States and in many global markets. The DD series pumps are unique because of the continuous run capabilities, very low fuel consumption, wide variety of dewatering applications and the ability to handle large solids with ease. Our DD Series pumps have become a benchmark for diaphragm pumps. The DD series pumps are excellent for: Open pit dewatering, Kelly wells, pumping out manholes, cleaning cesspools and septic tanks, small sock-drain, and small well-point systems. Our newest pump to the fleet is our DD-4S Barge pump.

DD-4S Double Diaphragm Pump Features

• Engine: HATZ 1D42Z, 5.7 HP Air-cooled Diesel
• Capacity: 425 GPM
• Solid Handling: 3.5″
• Max CFM: 60-70
• Max Suction Lift: 28 ft.
• Continuous Operating Time: 6-7 days, Can run dry.
• Fuel Consumption: 5-6 gal/day
• Fuel Capacity: 41 gal
• Height: 60″
• Length: 108″
• Weight: 1750 lbs


Construction and Utilities: Pumping open pit dewatering, low volume bypass pumping, cleaning manholes, small dredge operations, and bentonite slurry transfer.
Water Treatment:  Pumping out neutralized sludge’s, cleaning cesspools, septic tanks, and sludge material.
Industrial: Pumping out sludge’s, food processing pumping, bilge pumping, tank transfer, raw sewage and dirty water, cutting oils, water circulation, stringy and fibrous materials.

MSP Double Diaphragm (DD) Series Features


  • Heavy duty constructed frame and pump components
  • Designed to withstand the harshest environments
  • Self-priming, dry running
  • Large solid handling capability
  • Easy access cleanouts
  • Stainless valve seats
  • Low maintenance
  • High suction lift (28 ft.)
  • Powder coated frame and pump body
  • Company customization

Since 1991, we have worked hard to create a company culture that attracts, retains and rewards people committed to our high standards of excellence.

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