Franklin Constant Pressure Controllers

Constant pressure systems are changing the standard for private well systems all over the country. A private water well is one of the best sources of water for your home, but just as in municipal water systems, water pressure may sometimes be insufficient for the changing demands of the home. If you have a problem with water pressure in your home, you may have noticed that your washing machine fills more slowly when your dishwasher is running, or that your shower sputters when your sprinkler turns on. You don’t like it, but you live with it.

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With a constant pressure system, you don’t have to schedule your day around your water usage. Franklin’s SubDrive and MonoDrive constant pressure controllers vastly improve your home water system. Using variable speed technology, SubDrive and MonoDrive continuously monitor water demand and adjust the speed of your pump to provide the water you need without pressure fluctuations. Available in a wide variety of ratings.

These systems also provide:

  • Smooth, quiet operation
  • Choice of pressure settings
  • Built-in pumping system protection

SubDrive with NEMA-1 enclosure shown. The SubDrive 75-150 are also available with NEMA-4 (outdoor) enclosures. The SubDrive 300 is only available with NEMA-4 enclosure.

The Franklin SubDrive

For 3/4 1 1-1/2 and 3 HP 4" 3-Phase Submersible Pumps

Franklin Electric’s SubDrive constant pressure controller provides constant pressure by continually adjusting the speed of the pump to match water demand. Instead of draining and filling a large tank, a SubDrive system pumps more or less water as you need it. Finally, you’ll be able to run the dishwasher, do laundry and water the lawn – all at the same time!

Benefits:

  • Constant water pressure with a wide range of settings (25 to 80 psi)
  • Soft start feature prevents water hammer and increases motor life
  • Works with small pressure tanks or existing larger tanks
  • UL and CUL listed
  • Smart Reset™ technology allows well recovery before restarting the pump
  • Single-phase input power with three-phase motor performance (SubDrive models)
  • Excellent radio frequency interference shielding
  • Easy installation

Built-in Diagnostics and Protection

SubDrive and MonoDrive products all include diagnostic features and built-in protection for conditions that would be harmful to the system.

  • Surge Protection
  • Underload Protection
  • Undervoltage Protection
  • Locked Pump
  • Open Circuit
  • Short Circuit
  • Overheated Controller

MonoDrive with NEMA-1 enclosure shown.
MonoDrive and MonoDrive XT are also available with NEMA-4 (outdoor) enclosures.

The Franklin MonoDrive

For 1/2 3/4 and 1 HP 4" Single-Phase Submersible Pumps

While SubDrive provides constant pressure using single-phase input power with a three-phase motor, MonoDrive is designed to provide constant pressure for single-phase, three-wire systems – even those already in place. You can have constant pressure just by replacing a three-wire control box.

Features:

  • Selectable Hp rating (1/2, 3/4 and 1 hp)
  • Easy installation – remove the three-wire control box and install the MonoDrive
  • Retrofits existing systems no need to pull the pump
  • NEMA 1 Rated Enclosure
  • Single-phase, three-wire

Benefits

  • Constant water pressure with a wide range of settings (25 to 80 psi)
  • Soft start feature prevents water hammer and increases motor life
  • Works with small pressure tanks or existing larger tanks
  • UL and CUL listed
  • Smart Reset™ technology allows well recovery before restarting the pump
  • Excellent radio frequency interference shielding
  • Easy installation

Built-In Diagnostics Protection

Includes diagnostic features and built-in protection for conditions that would be harmful to the system.

  • Surge Protection
  • Underload Protection
  • Undervoltage Protection
  • Locked Pump
  • Open Circuit
  • Short Circuit
  • Overheated Controller