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Gorman-Rupp Replacement Diaphragms

Diaphragm Pump Parts – 2", 3" & 4"

Ken’s Distributing Company supplies Gorman-Rupp replacement diaphragms pumps used in construction, municipal, agricultural, and industrial applications. These diaphragms form the flexible barrier between the air and liquid chambers, creating the pumping action that moves fluids and solids without direct contact between the mechanical drive and the liquid.

We offer individual units and bulk orders, with bulk discounts starting at 15 diaphragms or more. We work directly with contractors, distributors, and small businesses, providing OEM-fit parts, competitive pricing, and nationwide shipping.

Why Choose Our Gorman-Rupp Diaphragms?

  • OEM-fit compatibility for Gorman-Rupp diaphragm pumps
  • Heavy-duty materials for demanding field environments
  • Excellent abrasion resistance for sediment-heavy and dirty water
  • Available in Rubber, Neoprene, and Buna by size and application
  • Designed to handle debris, slurry, and trash-laden fluids
  • Bulk order pricing for contractors and distributors

Applications

These diaphragms are used on Gorman-Rupp diaphragm pumps for:

  • Construction and site dewatering
  • Municipal and utility maintenance
  • Agricultural irrigation and transfer
  • Industrial fluid and slurry movement
  • Sewage and flood bypass pumping

Compatible Gorman-Rupp Replacement Sizes & Part Numbers

Ken’s Distributing Company supplies multiple diaphragm sizes and materials to fit Gorman-Rupp diaphragm pump models.

Used On Pump Models:

4D-B

4D-E3 3P

4D-X3 1P

4D-X3 3P

Function

Heavy-duty rubber diaphragm designed for 4-inch Gorman-Rupp pumps used to move water containing solids up to 2″ in diameter. Provides strong suction lift for debris-filled or abrasive fluids.

Gorman-Rupp 4" Replacement Diaphragm

Part Number

S-1017

Size

3″ x 4″

Material

Rubber

Used On Pump Models:

3D-B

3D-E1.5 1P

3D-E1.5 3P

3D-X1.5 1P

3D-X1.5 3P

Function

Durable diaphragm for 3-inch  pumps used in construction, agriculture, and industrial water transfer. Neoprene offers superior abrasion resistance, while Buna provides excellent oil and fuel resistance.

Gorman-Rupp 3" Replacement Diaphragm

Part Number

S-0701

Size

2″ x 3″

Materials Available

Neoprene Rubber, Buna

Used On Pump Models:

2D-E.50 1P

2D-E.50 3P

2D-X.75 1P

2D-X.75 3P

Function

Compact diaphragm for small electric motor-driven 2-inch pumps used in construction, light industrial, and utility work. Provides consistent displacement under varying flow conditions.

Gorman-Rupp 2" Replacement Diaphragm

Part Number

26812-711

Size

2″ x 2″

Material

Neoprene Rubber, Buna

Replacement & Maintenance Tips

To get the longest service life from your Gorman-Rupp diaphragm pump:

  • Inspect the diaphragm for cracking, dry rot, or stiffness every 100–150 hours of operation.
  • Replace immediately if the pump loses prime, displacement drops, or you see visible damage.
  • Match the diaphragm material to the application (abrasive slurry, clean water, oil-contaminated fluids).
  • Replace check valves, flappers, and wear items at the same time when possible.
  • Always torque clamping hardware evenly to maintain a proper seal and diaphragm life.

Choosing Between Rubber, Neoprene & Buna Diaphragms

Rubber

Best for abrasive and muddy conditions with high solids content.

Neoprene

Strong all-purpose material for construction and general water transfer.

Buna

Ideal when pumps encounter oils, fuels, or hydrocarbon-contaminated water.

Common Gorman-Rupp Pumps We Support

  • Electric motor and gasoline engine drive configurations
  • Contractor dewatering and trench work
  • Municipal and utility maintenance fleets
  • Agricultural transfer and irrigation applications

Why Order Gorman-Rupp Diaphragms from Ken’s Distributing Company?

  • Bulk discounts starting at 15 units or more
  • Serves contractors, distributors, and small businesses nationwide
  • OEM-quality diaphragms made from premium rubber, neoprene, and Buna compounds
  • Nationwide shipping and fast turnaround times
  • Technical support to match diaphragms by model, size, and material

Contact Ken’s Distributing Company

Call (303) 699‑7845
Email to Order
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