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Flojet 03121Z34B Pulley Driven Triplex Diaphragm Pump - 1.8 GPM, 50 PSI

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2.56 lbs
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A pully driven pump with triplex diaphragms. Constructed with materials to handle high temperatures and harsh chemicals. Handles a maximum pressure of 50 PSI and produces a maximum flow rate of 1.8 GPM.
Prep 65

Prop 65


Technical Specifications

Max GPM: 1.8
Max PSI: 50

Product Description

Pulley Driven Diaphragm Pump

The Flojet 03121Z34B is a diaphragm pump with triplex design and driven by a pulley system. It produces a maximum flow rate of 1.8 GPM and tolerates a maximum pressure of 50 PSI. Each of the three diaphragms are constructed with Santoprene for its resistance against harsh chemicals and high temperatures. It comes with two 3/8" hose barb 90 degree elbow fittings that connect with the snap in ports.

Specifications and Features:
  • Three Chamber Diaphragm pump
  • Pulley Driven
  • Santoprene TM Diaphragm
  • Viton Check Valves
  • Maximum Operating Pressure: 50 PSI (3.5 bar)
  • Maximum Flow Rate: 1.8 GPM
  • Self–Priming
  • Dry Running
  • Sealed Motor Drive Shaft
  • Snap-In Port Fittings
  • Includes: (2) 3/8” Hose Barb 90° Elbow Fittings

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:Does this pump include pulley? - Eric (05/31/2020)
Response:No, this is for the pump only.
Question:Does this pump have to be gravity fed? - Christopher (05/08/2020)
Response:No, it does not.