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Subdrive Inline 1100

Constant Pressure System


Don't put up with Fluctuating Water Pressures

Suitable for:
  • Motels
  • Apartment Blocks and Flats
  • Large Homes with Multiple Bathrooms
  • Above Ground Tanks and Pressure Boosting
  • Irrigation Systems
  • Farms
Pressure Boosting Constant Pressure Unit

Deliver Constant Water Pressure

This unique integrated pump, motor and drive is compact, quiet and easy to install. The SubDrive Inline 1100 constant pressure system does not simply increase the water pressure; this system will provide consistent pressure to every fixture in the home or installation at the same time.

In addition to being ideal for homes or bores or city water systems, a constant pressure system like the SubDrive Inline 1100, will maximise the output and performance of other common water usage applications as well.
Whether pumping from a tank, feeding a sprinkler or turf irrigation system, operating a livestock cooling system, or boosting pressure to a multi-head commercial wash down system, an increase in system performance and efficiency can be gained through Franklin Electric's SubDrive Inline 1100 constant pressure system.

Franklin Electric's SubDrive inline 1100 provides constant pressure for both private bores / wells and municipal / city water systems.


  • A complete and packaged system
    - Pump, motor, drive and pressure sensor in one box

  • Small and compact design
    -Fits into small areas, even between floor joists

  • Stainless steel construction
    -Made for years of operation

  • Simple and easy installation
    -Step-by-step illustrated instructions

  • Quiet and cool operation
    -Integrated motor design allows water to flow around it

  • IP56 (NEMA 4) outdoor use. C Tick approved electronics enclosure

  • Multiple mounting configurations
    -Lets you install the unit where you need it: horizontal, vertival and even upside down

  • Product power rating: 0.9kW

  • Shipping weight: 22.7 kg

mounting the constant pressure system

Built in system protections guard the inline unit from many common failure modes including: surge protection, voltage underload, locked pump, open circuit, short circuit and overheated controller

Comes with 3 Year Warranty

dimensions of the inline constant pressure system

More information on the Franklin inline constant pressure unit

Typical Installation of the Inline Constant Pressure System

installation of a constant pressure system
* For flows up to 45LPM an 8 Litre tank can be used. Over 45LPM an 18L tank or larger is required.

Performance Curve for the Inline 1100 Subdrive Constant Pressure System

Franklin Electric Subdrive 1100 Inline Constant Pressure System

Increase your pressure... and keep it constant with the Inline Constant Pressure System

  • Boosted and consistent water pressure from water storage / tank systems
  • Homes - both in private and municipal applications
  • General pressure boosting
  • Sprinkler systems
  • Farming and commercial wash down systems

Municipal and City Water Systems

Now there is an affordable answer for homeowners not satisfied with the water pressure they receive from their city water provider. The inline 1100 is a simple efficient product that allows the homeowner to add to their water usage, or just boost and maintain pressure.

Bores and Well

The inline 1100 provides a constant pressure solution for homes with low yielding bores and wells or where storage tanks are used.

Want to add a sprinkler system?

The inline 1100 is versatile and makes quick work of booster pump installation, often needed in a sprinkler system. The IP56 (NEMA 4) outdoor use electronics enclosure ensures a watertight seal.

system components for the inline constant pressure system unit

Purchase the Subdrive inline 1100 Constant Pressure System with 8L tank $2120
Purchase the Subdrive inline 1100 Constant Pressure System with 18L tank $2150

What you get:

  • Pump, Motor and Drive
  • Pressure Sensor
  • Pressure Tank
  • Check Valve
  • Pressure Gauge
  • Discharge and suction flanges

You don't get the manifold kit

Manifold kit installedmanifold kit    
Purchase the Manifold Kit separately (arm only) $270

For Consistent Water Pressure

Technical Information

  • Flow range: up to 135lpm
  • Product power rating: 0.9kW
  • Minimum incoming pressure: 0.2 - 0.3 bar (3-5 psi)
  • Minimum incoming flow and tanks: flooded suction without water vortexing
  • Maximum incremental pressore boost: 4.1 bar (60psi)
  • Maximum ambient operating temp: Continuous operation - 40°C (104°F)
  • Maximum fluid operating temp: 40°C (104°F)
  • Incoming voltage: 190 - 260 vac*
  • Frequency 50/60Hz
  • Current (maximum): 12 Amps (rms)
  • Pressure setting from factory: 3.4 bar (50psi)
  • Pressure adjustment range: 1.7 - 5.5 bar (25 - 80 psi)
  • Relative humidity: 0 - 100%, condensing




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