A.Y. McDonald 6617-432, MonoDrive Constant Pressure Controller, Use With 1/2 HP, 3/4 HP or 1 HP Single Phase Pumps/Motors, 208/230 Volts, 1 Phase, Nema 3R Enclosure

SKU #: 6617-432
Brand: A.Y. McDonald
Available For Order! (Usually Ships 5-7 Days)This product is direct shipped from the manufacturer to our distribution center where it is checked, packaged and processed by our quality control team. The shipping time shown is the estimated number of business days the product will ship out from our warehouse, excluding any manufacturer back logs or delays.
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 LIST PRICE 1,326.00
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A.Y. McDonald MonoDrive Controller

This constant pressure controller provides the flexibility to convert a single phase conventional pump system to a constant pressure system with a simple replacement of the three wire control box and pressure switch. The MonoDrive can retrofit any existing 1/2 HP - 1 HP three wire single phase water well system which means that homeowners can enjoy the benefits of constant water pressure without purchasing a new pump.  The performance is the same as standard 1/2 - 1 HP pump/motor sets. It is great for homes that have a wide range of flow demands. The MonoDrive controller is equally effective on new installations. The MonoDrive is design to convert a conventional 1/2 HP to 1 HP pump system to a variable speed constant pressure system by simply replacing the three-wire control box and pressure switch. They are easy to install, smooth running, just plug and play.


  • Nema 3R
  • Constant water pressure with a wide range of settings (25-80 psi)
  • Single-phase input power
  • FE Connect Smartphone app for advanced settings and monitoring (NEMA 3R only)
  • User-configurable motor frequency range (NEMA 3R only)
  • Easy installation
  • Soft-start feature prevents water hammer and increases motor life
  • Works with small pressure tanks or existing larger tanks
  • Advanced filtering to remove radio frequency interference
  • UL and cUL listed
  • Fan kit is easily replaceable
  • Built-in diagnostics and protection
    • Surge protection
    • Underload
    • Undervoltage
    • Locked pump
    • Open circuit
    • Short circuit
    • Overheated controller
    • Broken pipe detection (NEMA 3R only)
    • Replaceable pressure sensor board (NEMA 3R only)


  • Residential homes
  • Schools
  • Restaurants
  • Car washes
  • Farms
  • Landscape irrigation systems

Note: Designed to be used in the above applications with a A.Y. McDonald 1/2 - 1 HP submersible pump already in place with a Franklin Electric single phase three wire motor.


BrandA.Y. McDonald
Mfg. Number6617-432
Voltage208/230 Volts

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