Little Giant 25LGIL1100N4 Performance
Little Giant 25LGIL1100N4 Constant Pressure Booster Pump System 90411101

25LGIL1100N4 In-Line Constant Pressure System, 1-1/5 HP, 230V

Little Giant

Brand: Little Giant

Mfr Part#: 90411101

Model: 25LGIL1100N4

Usually ships: within 7-10 business days
Qty Price
$1,315.95 / each & Free Shipping
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Little Giant 25LGIL1100N4 (90411101) Inline Constant Water Pressure System provides consistent water pressure regulation using advanced electronics to drive the pump/motor according to the system's real-time demand. The Little Giant 25LGIL1100N4 includes highly accurate, heavy-duty, longlife pressure sensor for constant monitoring of the water pressure demand.

By adjusting the pump/motor speed, the Inline System automatically reacts to any change in system demand while maintaining a constant output pressure. The Inline System's constant output pressure should not fluctuate more than a PSI or two, even though the overall system's water flow requirement may change dramatically. Small demand on the system results in the motor/pump running at its lowest speed. As greater demands are placed on the system the speed increases accordingly to maintain the desired system pressure.


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


  • A complete and packaged system: Pump, motor, drive and pressure switch 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;
  • NEMA 4 electronics enclosure;
  • Multiple mounting configurations;
  • Install units where you need them: horizontal, vertical & even uPSIde down;
  • Product power rating: 1.2 hp, 0.9 kW;
  • 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.

Technical Specifications:

  • Flow range: Up to 35 GPM;
  • Product power rating: 1.2 HP (0.9 kW);
  • Minimum incoming pressure: 3 - 5 PSI;
  • Minimum incoming flow and cisterns: flooded suction without water vortexing;
  • Maximum incremental pressure boost: 60 PSI;
  • Maximum ambient operating temp: Continuous Operation: 104 °F (40 °C);
  • Maximum fl uid operating temp: 104 °F (40 °C);
  • Incoming voltage: 190 - 260 vac (Drive will operate at reduced power level at 190 vac.);
  • Frequency: 50/60 Hz;
  • Operating frequency range: 20 - 63 Hz;
  • Current (maximum): 12 Amps;
  • Pressure setting from factory: 50 PSI (3.4 bar);
  • Pressure adjustment range: 25 - 80 PSI;
  • Relative humidity: 0 - 100%, Condensing;
  • Shipping weight: 50 lbs (22.7 kg);
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