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Mud Hog Diaphragm Pump Replacement Parts

Replacement Diaphragms for 2", 3" & 4" Mud Hog Pumps

Is your Mud Hog diaphragm pump losing suction or slowing down? Don’t risk job-site downtime or lost production.

Ken’s Distributing Company supplies OEM-fit Mud Hog replacement diaphragms designed for trash and dewatering diaphragm pumps used across construction, municipal, industrial, and agricultural operations.

The diaphragm is the flexible wear component that separates the air and liquid chambers, creating the vacuum and pressure needed to move water, slurry, and debris. Replacing worn diaphragms restores full suction lift, flow consistency, and overall pump performance.

We supply both individual replacements and bulk orders of 15 units or more, with discounted pricing for contractors, distributors, and rental companies nationwide.

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2-Inch Mud Hog Replacement Diaphragms (200 Series)

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3-Inch Mud Hog Replacement Diaphragms (300 Series)

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4-Inch Mud Hog Replacement Diaphragms (400 Series)

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How Mud Hog Diaphragm Pumps Work

  • Dual diaphragms create alternating suction and discharge strokes.
  • Flexible diaphragms separate the air and liquid chambers inside the pump body.
  • Vacuum and pressure move water, slurry, and debris without an impeller.
  • Ideal for liquids with sand, mud, and small solids that would damage standard pumps.

Where Mud Hog Pumps Are Used

  • Construction dewatering and excavation drainage
  • Municipal utility maintenance and bypass work
  • Agricultural irrigation and lagoon or pond transfer
  • Industrial wastewater and slurry movement
  • Emergency flood and storm cleanup

200 Series

2-Inch Mud Hog Replacement Diaphragms (200 Series)

Reliable replacements for the 2-inch Mud Hog diaphragm pumps used in utility, light construction, and irrigation applications.

Fits Mud Hog models:

201, 202, 202D, 203, 204.

Each pump uses two diaphragms for a complete replacement.

Used For: light construction site drainage, irrigation systems, utility maintenance, and general water transfer.

Available Materials (2" × 2")

Part # Material Description
P2331R Rubber (2 × 2) Standard-duty diaphragm for clean or slightly gritty water applications.
P2331N Neoprene (2 × 2) Resistant to chemicals and abrasion, ideal for light slurry and dirty water.
P2331B Buna-N (2 × 2) Best suited for water contaminated with oil, fuel, or hydrocarbons.
P2331TPE TPE (2 × 2) Premium compound offering maximum wear life and temperature tolerance.

Optional Diaphragm Sets

  • SA-10003B – Buna-N
  • SA-10003N – Neoprene
  • SA-10003V – Viton
  • SA-10004N – Neoprene with Cloth Insert

300 Series

3-Inch Mud Hog Replacement Diaphragms (300 Series)

Heavy-duty replacements for the 3-inch Mud Hog diaphragm pumps that handle higher-volume water movement for municipal and industrial jobs.

Fits Mud Hog models:

302, 302B, 302C, 304, 305.

Each pump uses two diaphragms for a complete replacement.

Used For: construction dewatering, wastewater transfer, agricultural liquids, and industrial bypass pumping.

Available Materials (3" × 3")

Part # Material Description
P2726R Rubber (3 × 3) Flexible, long-life diaphragm for general water and light sludge transfer.
P2726N Neoprene (3 × 3) Durable, abrasion-resistant option for slurry and sediment-laden water.
P2726B Buna-N (3 × 3) Ideal for oily or hydrocarbon-contaminated water.
P2726TPE TPE (3 × 3) Long-wear compound for chemical exposure and demanding pumping cycles.

Optional Diaphragm Sets

  • SA-10001B – Buna-N
  • SA-10001N – Neoprene
  • SA-10002N – Neoprene with Cloth Insert

400 Series

4-Inch Mud Hog Replacement Diaphragms (400 Series)

Engineered for large-capacity Mud Hog 4-inch pumps used in flood control, sewer bypass, and major construction dewatering.

Fits Mud Hog models:

403, 404, 405, 414, 419, 445, 446.

Each pump uses two diaphragms for full service replacement.

Available Materials

4-inch Mud Hog replacement diaphragms are available in Rubber, Neoprene, Buna-N, and Thermoplastic Elastomer (TPE) to match your specific jobsite conditions (abrasive slurry, clean water, or hydrocarbon-contaminated liquids).

Contact Ken’s Distributing Company for current 4-inch Mud Hog part numbers, repair kits, and compatible flapper or valve assemblies.

Replacement & Maintenance Tips

  • Inspect diaphragms regularly for cracking, stiffness, or fabric showing through.
  • Replace both diaphragms together when performance drops for balanced operation.
  • Match diaphragm material to the liquid: clean water, slurry, oil, or chemical exposure.
  • Check flappers and valve assemblies during every diaphragm change and replace as needed.
  • Follow Mud Hog torque and assembly instructions for proper sealing and service life.

Why Buy Mud Hog Diaphragms from Ken’s Distributing Company?

  • OEM-fit diaphragms for Mud Hog 200, 300, and 400 Series pumps
  • Available in Rubber, Neoprene, Buna-N, and TPE compounds
  • Bulk discounts on orders of 15 units or more
  • Nationwide shipping with fast turnaround to keep jobs moving
  • Trusted by contractors, rental yards, municipalities, and industrial plants
  • Expert support for diaphragm sizing, materials, and pump compatibility

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