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Multiquip Replacement Diaphragms

Durable Multiquip Replacement and Repair Parts

Need reliable Multiquip replacement diaphragms to keep your pump system running strong? When downtime means lost productivity on the jobsite, you need diaphragms built to last. Ken’s Distributing Company supplies high-grade Multiquip replacement diaphragms designed to fit the most common 2-inch and 3-inch Multiquip pumps used in construction, dewatering, grinding and grooving operations, municipal water removal, and industrial transfer applications.

Every Multiquip diaphragm we stock is built to match the original equipment specs in size, bolt pattern, and material thickness. Drop-in fitment matters because a diaphragm that does not seat correctly will leak, lose prime, or tear early.

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Available materials

Neoprene

Rubber

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Neoprene

2 Inch Multiquip Replacement Diaphragm - Neoprene

2″ Multiquip Replacement Diaphragm – Neoprene

3 Inch Multiquip Replacement Diaphragm - Neoprene

3″ Multiquip Replacement Diaphragm – Neoprene

Rubber

2 Inch Multiquip Replacement Diaphragm - Rubber

2″ Multiquip Replacement Diaphragm – Rubber

3 Inch Multiquip Replacement Diaphragm - Rubber

3″ Multiquip Replacement Diaphragm – Rubber

Get a Fast Quote from a Pump Specialist

When downtime means lost productivity, you need Multiquip replacement diaphragms in your hands fast. Our parts team can match your pump and ship the right part the same day on most in-stock orders.

Call (303) 699-7845 to confirm the correct fit for your Multiquip pump.

Compatible Replacement Sizes

We stock Multiquip replacement diaphragms in the two most common sizes used in construction and dewatering work, with custom fits available on request.

2-Inch Diaphragm Replacement

Standard 2-inch replacement diaphragms for Multiquip pumps used in trench dewatering, light slurry transfer, and general site work. Available in all four compounds.

3-Inch Diaphragm Replacement

Larger 3-inch replacement diaphragms for Multiquip pumps moving higher volume, heavier solids, and full-day jobsite loads. Available in all four compounds.

Custom Sizes for Select Industrial Pumps

Older or specialty Multiquip pumps sometimes need a non-standard diaphragm. Send a photo of the pump tag and a measurement of the existing diaphragm, and our team can source the correct fit.

Compatible Pump Brands and Models

Our Multiquip replacement diaphragms are compatible with the most common Multiquip diaphragm pump configurations used across construction and dewatering work. If you cannot identify the exact part number from your pump tag, send our parts team a clear photo of the model and serial number plate and we can confirm the correct fit.

Compatible diaphragm replacements include:

  • 2-inch Multiquip diaphragm pumps
  • 3-inch Multiquip diaphragm pumps
  • Trailer-mounted Multiquip dewatering units
  • Engine-driven Multiquip pump configurations
  • Legacy Multiquip pumps no longer supported by the OEM

Available Materials

Every Multiquip replacement diaphragm in our inventory is available in four proven compounds. The right material depends on the fluid type, temperature range, and contamination level in your application.

Neoprene Diaphragms

Neoprene (chloroprene rubber) offers excellent strength, flexibility, and resistance to abrasion, weathering, and moderate oil exposure. A balanced all-around choice for outdoor construction and dewatering use.

  • Excellent abrasion and weather resistance
  • Moderate oil resistance
  • Long-lasting durability under heavy use
  • Temperature range: -20°C to 100°C

Rubber Diaphragms (General Purpose)

General-purpose rubber diaphragms balance flexibility, durability, and cost. Ideal for non-aggressive fluids such as water, air, and mild chemicals in light-duty or routine maintenance applications.

  • Affordable and widely compatible
  • Excellent flexibility and elasticity
  • Easy installation in standard housings
  • Suitable for fluid transfer, air systems, and pool applications

Buna-N (Nitrile) Diaphragms

Buna-N is the right choice when the pumped fluid contains petroleum, fuels, or hydrocarbons. Excellent oil and fuel resistance with strong tensile strength under pressure.

  • Excellent resistance to fuels, oils, and hydrocarbons
  • High tensile strength and flexibility under pressure
  • Temperature range: -40°F to 250°F
  • Limited ozone and weather resistance — best for sealed applications

TPE (Santoprene) Diaphragms

Thermoplastic Elastomer diaphragms deliver superior chemical resistance and impressive flex life. Built for the most demanding jobs and the widest range of fluids, from acids and alkalis to abrasive slurries.

  • Superior resistance to acids, alkalis, and solvents
  • Wide temperature tolerance for hot and cold environments
  • Solid performance with abrasive materials and slurries
  • Long flex life under high cycle counts

Why Choose Multiquip Replacement Diaphragms from Ken's?

Multiquip diaphragm pumps work hard. They pull water, mud, sludge, and small debris hour after hour. The diaphragm is the single part doing the heaviest lifting inside that pump, and the right replacement protects the rest of the equipment.

Key advantages include:

  • OEM-fit dimensions for clean installation
  • Four compound options for any fluid type
  • Long-lasting durability under heavy use
  • Good flexibility and vibration resistance
  • Maintains seal integrity over time
  • Compatible with trash, sludge, and dewatering applications

Applications of Multiquip Diaphragm Replacement Parts

Multiquip diaphragm pumps serve crews across construction, municipal, and industrial work. The compound you choose depends on the fluid being pumped and the conditions on the job.

Construction and Dewatering

Multiquip pumps are a fixture on construction sites where standing water, slurry, and sediment have to be moved out fast. Neoprene and Rubber diaphragms are the most common choice here for everyday water handling.

Concrete and Slurry Pumps

Multiquip pumps handling concrete washout, slurry, and abrasive materials need diaphragms that resist wear without losing flexibility. TPE (Santoprene) is built for this kind of duty.

Grinding and Grooving Operations

Reliable diaphragm performance keeps your Multiquip equipment consistent during high-vibration grinding and grooving work. Neoprene compound holds up best under repeated flex cycles.

Fuel and Hydrocarbon Transfer

When the pumped fluid may contain fuel, diesel, or oil, Buna-N is the only compound to consider. It resists swelling and breakdown from petroleum-based contamination.

How to Know When to Replace a Diaphragm

A worn Multiquip diaphragm rarely fails all at once. Output drops gradually until the pump will not prime or hold suction. Catch the wear early and you save the rest of the pump from costly repair.

Watch for these warning signs:

  • Pump takes longer to prime than it used to
  • Discharge flow drops noticeably at full throttle
  • Air bubbles appear in the discharge stream
  • Visible cracks, splits, or thin spots in the diaphragm rubber
  • Water seeps from around the diaphragm cover plate
  • Pump vibrates more than normal during operation

Replacing the diaphragm at the first sign of wear prevents debris from reaching the valves, seats, and connecting rod, which are far more expensive to repair than the diaphragm itself.

Replacement and Maintenance Tips

A Multiquip replacement diaphragm performs best when installed correctly and supported by clean wear parts.

  1. Inspect diaphragms every 500 to 1,000 hours of operation for wear, cracks, or thinning
  2. Replace both diaphragms at the same time to maintain balanced pressure
  3. Check valves and seats for buildup or debris that could reduce pump efficiency
  4. Use the compound that matches your fluid type and operating conditions
  5. Torque cover plate bolts evenly in a star pattern to prevent uneven sealing
  6. Flush the pump after handling muddy, chemical-laden, or fuel-contaminated water
  7. Store the pump out of direct sunlight to slow ozone and UV breakdown

Following these steps can extend diaphragm life and protect the valves, seats, and connecting rod from secondary damage.

Choosing Between Neoprene, Buna, and TPE Diaphragms

The fastest way to pick the right Multiquip diaphragm is to match the compound to the fluid:

  • Clean water and general use — Rubber or Neoprene
  • Outdoor exposure and moderate oil contact — Neoprene
  • Fuel, diesel, or hydraulic fluid contamination — Buna-N (Nitrile)
  • Acids, solvents, abrasive slurry, or high cycle counts — TPE (Santoprene)

If you operate a mixed fleet pumping different fluids on different jobs, our team can build a parts kit that covers every scenario.

Why Buy Multiquip Diaphragms from Ken's Distributing?

Ken’s Distributing Company has supplied diaphragm pump replacement parts to contractors, rental fleets, and municipal water crews since 1991. We are America’s Water Pump Parts Distributor and an authorized dealer for Franklin Electric, Monarch, CH&E, Generac Magnum, and Red Lion.

Our customers stay with us because the parts fit, the support team understands the equipment, and we keep stock on lines other suppliers no longer carry.

What you get when you order from Ken’s:

  • Fast shipping on standard and hard-to-find parts (most orders ship same day)
  • Expert support to identify the correct diaphragm for your pump model
  • Competitive pricing and bulk order options
  • Blanket order programs for contractors and rental fleets
  • Free shipping on complete pump orders
  • Phone and email parts desk staffed by people who know diaphragm pumps

We are committed to helping you reduce downtime and extend equipment life with dependable replacement parts.

Order Your Multiquip Replacement Diaphragm Today

When your Multiquip pump needs repair, trust Ken’s Distributing for the best Multiquip replacement diaphragms in stock and ready to ship. Whether you need a 2-inch or 3-inch diaphragm in Rubber, Neoprene, Buna-N, or TPE, we have the right part to restore full performance and minimize downtime.

Request a quote online, or reach our parts team direct.

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