Skip to Main Content

Flojet R4425505A Sensor Max VSD Pump - 4.5 GPM, 40 PSI, 12 VDC

Mfr. Model #:
KR Part #:
8.50 lbs
Call For Availability
Now Only!
This is a sensor-controlled pump that utilizes a solid-state pressure sensor. Sensor adjusts pressure by controlling the motors speed. Pump is self-priming.
Prep 65

Prop 65


Technical Specifications

Max PSI: 40
Voltage DC: 12
Max GPM: 4.5

Product Description

Sensor Controlled Pump

Flojet's Sensor Max pump is made to speed up as demand on the unit increases. Features a solid-state pressure sensor. Pressure is controlled by adjusting the motor's speed. Pump is self-priming and can run dry. 


  • Volts: 12VDC
  • Amps: 12A Max (Fuse at 15 A)
  • Flow: 4.5 GPM (17.0 LPM)
  • Pressure: 40 PSI
  • Sensor Controlled
  • Sensor VSD 4.5 Water Pump


  • Variable Speed Control
  • Solid State Pressure Sensor
  • Nearly Silent Operation / No Cycling
  • Operates on 12V DC or 24V DC
  • Controls Pressure by Changing Motor Speed
  • Speeds Up as Demand Increases
  • Self-priming / Runs Dry
  • No Accumulator Tank Needed
  • CSA Listed / EN ISO 8846 Marine / C.E. Certified
  • Protected under U.S. Patent #6,607,360
  • Includes Inlet Strainer

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