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Diaphragm Pumps

Trade Names: mud pumps, mud hogs membrane pumps, positive displacement pumps.


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Diaphragm pumps move water by contracting or expanding a flexible diaphragm. When expanded it draws in air and fluid into the chamber. The downward stroke pressurizes the chamber to discharge fluid and air. The air handling ability makes it ideal for slow seepage applications where centrifugal pumps would lose their prime.

Who uses diaphragm pumps?General contractors; farmers, residential and commercial operators, municipalities, government agencies, first response organizations, commercial boat operators, pool and spa service companies, public works departments.

Where are diaphragm pumps needed?
Site preparation, cesspools, septic tanks, slurry removal, slow seepage, utility and public works, agricultural, standing water removal, emergency flooding response, sewer dewatering operations, and thick, heavy viscosity fluids must be moved.

What else may the customer need?
NPT Thread or Cam & Groove Q/D disconnect suction and discharge hoses, couplers and PVC pipe.

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Let’s Talk Diaphragm Pumps.

  1. Casing Design - die-cast aluminum reduces weight.
  2. Diaphragm - abrasion resistant BUNA N (NBR) for long life and resistance to many alkaline and low pH fluids.
  3. Quality Engine Choices - HONDA gasoline engines with low oil shut-off.
  4. Trusted Performance - can be relied upon to move heavy viscosity fluids without cavitation.
  5. Contractor Features - Integral wheel kit, easy access clean-out bowl

DID YOU KNOW? The diaphragm pumps can pass debris 1 5/8” in diameter.

Learn more! Download MQ Dewatering Pumps brochure or the MQ Pumping Handbook at