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CH&E & Magnum Replacement Diaphragms

2", 3" & 4" Diaphragm Pump Parts

Ken’s Distributing Company stocks and supplies OEM-fit CH&E and Magnum replacement diaphragms engineered for diaphragm-type trash and dewatering pumps used throughout the construction, municipal, industrial, and agricultural industries.

These diaphragms are the working heart of every CH&E pump. Each flexible disc separates the air and liquid chambers, allowing the pump to draw in and discharge water, slurry, and debris without mechanical seals or lubricants contacting the fluid. Proper diaphragm replacement is critical for maintaining suction lift, flow consistency, and overall pump efficiency.

We offer both individual replacements and bulk orders starting at 15 units or more, with discounted pricing for contractors, distributors, and small businesses. Every diaphragm is manufactured to OEM specifications for size, thickness, and compound composition to ensure proper fit and long service life.

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2-Inch CH&E & Magnum Replacement Diaphragms

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3-Inch CH&E & Magnum Replacement Diaphragms

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4-Inch CH&E & Magnum Replacement Diaphragms

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Why Choose CH&E & Magnum Replacement Diaphragms?

  • OEM-fit diaphragms for CH&E and Magnum trash and dewatering pumps
  • Manufactured to original size, thickness, and compound specifications
  • Neoprene, rubber, Buna-N, and TPE compounds available by application
  • Designed to handle slurry, sand, and debris that destroy conventional pumps
  • Bulk discount pricing for contractors, distributors, and small fleets
  • Nationwide shipping with fast turnaround on common pump sizes

Where CH&E and Magnum Pumps Are Used

CH&E positive-displacement diaphragm pumps are relied upon for:

  • Construction dewatering and excavation drainage
  • Municipal utility maintenance and bypass operations
  • Agricultural irrigation and livestock water management
  • Industrial wastewater and slurry movement
  • Emergency flood and storm cleanup

These pumps handle liquids containing sand, mud, and small solids that would damage conventional impeller pumps.

2-Inch Series

2-Inch CH&E & Magnum Replacement Diaphragms

Fits CH&E 2-inch pump models

5401, 5402, 5403, 5405, 6401, 6402, 6403, 6405.

Used For: light construction, irrigation systems, industrial slurry pumping, and general utility pumping.

Refer to the CH&E 2-inch pump parts breakdown for complete repair kits and related components.

Available Compounds & Part Numbers

Part # Compound Application
P2331N Neoprene Standard for most water or slurry transfer.
P2331R Rubber Flexible diaphragm for clean or slightly gritty water.
P2331B Buna-N Excellent resistance to oil, fuel, and hydrocarbon-contaminated water.
P2331TEP TPE Thermoplastic Elastomer, resists wear and chemicals under heavy duty.

Alternate Compounds

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

3-Inch Series

3-Inch CH&E & Magnum Replacement Diaphragms

Used For: construction dewatering, agricultural transfer, industrial slurry pumping, and industrial water movement.

For additional parts such as flappers and valve assemblies, see the CH&E 3-inch pump parts breakdown for models 5500–6535.

Available Compounds & Part Numbers

Part # Compound Application
P2726N Neoprene General-purpose, abrasion-resistant.
P2726R Rubber Durable for water and light sludge.
P2726B Buna-N Fuel and oil resistant for hydrocarbon-contaminated or industrial use.
P2726TEP TPE Thermoplastic Elastomer, extended-life compound for heavy use.

Optional Diaphragm Sets

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

4-Inch Series

4-Inch CH&E & Magnum Replacement Diaphragms

Used on CH&E 4-inch diaphragm pumps for large-volume dewatering, slurry movement, and flood control.

Used For: large-volume dewatering, flood control, sewer bypass operations, and industrial slurry pumping.

Available Compounds & Part Numbers

Part # Compound Application
P2157B Buna-N Oil- and fuel-resistant for hydrocarbon-contaminated liquids.
P2157R Rubber Standard duty for clear or sediment-laden water.
P2157N Neoprene Chemical-resistant for wastewater and industrial use.
P2157T TPE Thermoplastic Elastomer, long-wear option with wide chemical tolerance.

Refer to the CH&E 4-inch pump parts breakdown for complete repair parts, flappers, and valve assemblies.

Replacement & Maintenance Tips

  • Inspect diaphragms regularly for cracking, stiffening, or fabric showing through.
  • Replace the diaphragm if the pump loses prime, stroke, or discharge flow.
  • Match the compound to your application (abrasive, oily, or chemical-laden fluids).
  • Replace flappers and valve assemblies at the same time when possible.
  • Follow torque specifications from the CH&E parts breakdown for even clamping and seal life.

Why Buy CH&E & Magnum Diaphragms from Ken’s Distributing Company?

  • Supplies OEM-quality diaphragms for all CH&E pump models
  • Bulk discounts begin at 15 units or more
  • Nationwide shipping with quick turnaround on common sizes
  • Works directly with contractors, distributors, and small businesses
  • Provides technical support for diaphragm selection and compatibility

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