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Flojet N5100040B Duplex Diaphragm Pump, 2.5 GPM, Santoprene

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1.11 lbs
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Self-priming duplex diaphragm pump for general commercial and industrial applications. Capable of handling a broad range of chemicals. Maximum 2.5 GPM flow rate, Santoprene diaphragm and check valve.
Prep 65

Prop 65


Technical Specifications

Max GPM: 2.5
Min PSI: 20
Max PSI: 80
Min Temperature: 40 degrees F
Max Temperature: 120 degrees F
Inlet Port: 3/8 inch
Outlet Port: 3/8 inch

Product Description

FloJet N5100 Series Pump with Santoprene Diaphragm

Perfect for light general commercial and industrial applications, this pump is APU AOD air powered. Compact design makes it easy and convenient to integrate into systems, and no relief or bypass plumbing is required! Acetal copolymer housing and Santoprene diaphragm and check valve make it capable of handling a broad range of chemicals. 3/8" Hose Barb inlet and outlet ports, 1/4" Hose Barb air ports.


  • Maximum Flow: 2.5 GPM
  • Gas Supply Pressure Range: 20 to 80 PSI
  • Liquid Temperature Range: 40°F - 120°F
  • Inlet Port: 3/8" Hose Barb
  • Outlet Port: 3/8" Hose Barb

WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm (For more information go to

Product Reviews

Frequently Asked Questions

Question:Do you have an owners manual for this pump? - Brian (04/04/2020)
Response:Here is a link to the manual: