S100C20 / S101C20

Get the power and performance of a traditional midship fire pump in a compact, lightweight design. Made of ductile iron, the S100 are nearly 35% lighter, and yet 25% stronger than identical pumps made with gray iron. Available as a direct-engine mount or matched with a Waterous aluminum case transmission.

The S100/S101 Split-Shaft model is equipped with a chain-driven C20 Transmission. The C20 Transmission provides the best In-Class power transfer.The silent chain-drive provides no gear whining, provides positive shifting and requires less horsepower that will enhance the efficiency of the apparatus.


S100C20 Front View

More Views

  • S100C20 Front View
  • S100C20 Rear View
  • S101C20 Front View
  • S101C20 Rear view
  • C20 Transmission
  • Meets or Exceeds National Fire Protection Association Standards
  • Meets GOST R52283-2004 Russian Product Certification
GPM 1250, 1500, 1750, 2000
l/min 5000, 6000, 7000, 8000
l/sec 80, 100, 115, 130
PSI Bar kPa MPa
150 10 1000 1.0


  • Cast ductile iron body
  • Dual stripping edge volute
  • Passive lubrication system
  • Self-adjusting mechanical seal
  • Mechanically and hydraulically balanced impeller
  • Replaceable bronze wear rings
  • All deep-groove anti-friction ball bearings, oil-splash lubricated
  • 5-inch ANSI flange or optional end flanged discharge manifold
  • C20 Transmission consisting of an aluminum case and chain-driven for silent operation
  • 5-Year Limited Warranty

Options and Accessories

  • Priming System: An electric, oil-free rotary vane primer mounted directly on a Waterous split-shaft pump transmission or separately mounted combined with a Waterous priming valve forms the priming system. A lubrication option allows the use of Prime-Safe lubricant (priming tank is required when the lubrication option is selected).
  • Pressure Control System: The Waterous Intake Relief Valve system is designed to act as a safety valve by "dumping" excess pressure from the inlet side of the pump. The Discharge Relief Valve provides sensitive pump control to protect firefighters from sudden pressure surges resulting from changes in discharge flows from the pump.
  • Manifold Drain Valve drains all points of the pump simultaneously with the operation of a single control.
  • Corrosion Protection: Replaceable zinc element that is installed directly on the pump intake piping and into the pump waterway. These anodes sacrifice the zinc element to galvanic corrosion.
  • Discharge Valves: Your choice of the trusted Waterous 1⁄4 turn 2.5 inch and 3.5 inch rack and sector push-pull, worm gear and electric discharge valves. All come standard with chrome-plated brass ball and hydraulically balanced seal assembly.
  • Overheat Protection Manager: The OPM consists of an illuminated warning light on the operator's panel whenever the pump approaches an overheat condition. Optional audible alarm is available.
  • Foam Manager: Consisting of a 500 or 1000 GPM foam manifold and foam proportioner.
  • Power Shift (S100 with C20 Transmission): Pneumatic shift allows operator to shift from ROAD to PUMP position by actuating a valve.
  • Electronic Tachometer Sensor (S100 with C20 Transmission): Monitors driveline rotational speed.
  • Waterous 21st Century Manifold: Designed to be mounted on the S100 discharge flange and can be oriented for top or side-mount control panels.
  • Five-Year Limited Warranty with Total Protection Package (TPP-5): The Total Protection Package is a comprehensive warranty that increases your standard warranty to include labor expenses to dismantle, remove and reinstall covered products or parts.


 S100C20 / S101C20 Series
Pump Information  Transmission Information

Dimensional Drawings

Data Sheet


Performance Curves

Performance Sheets

Service Parts Lists

Spec Sheets

 Dimensional Drawings

Data Sheet


 Service Parts Lists

Miscellaneous Items




Sales/Application/Service Help

Industry-leading sales and support.

When you purchase Waterous equipment, not only do you get quality products, you get quality service. Our expert service technicians are the best in the business and they are always happy to answer any service questions you might have. The numbers for our service and training specialists are listed below for your convenience. If you have a general service question please call our main number and our staff will kindly direct you to the appropriate department.

Sales/Applications Assistance

Phone: 651-450-5234 (Press 3)


Service Assistance
Phone: 651-450-5200
Fax: 800-488-1228


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