- Real-time data for tracking engine performance
- Connection history log for better operational insights
- User-friendly interface for quick access to critical data
- Geolocation capabilities to log pump locations and optimize fleet management
Products
WATERAX offers a complete line of high performance portable centrifugal pumps.MARK-3® Watson Edition Portable High-Pressure Fire Pump
100137
MARK-3® Watson Edition Portable High-Pressure Fire Pump
100137
Engineered for versatility in the field, the MK3-W supports flexible fuel configurations and adapts easily to a wide range of operational needs. Lightweight, rugged, and proven on the fireline, it empowers crews with consistent power and confidence when conditions are unpredictable and time is critical.
The MARK-3® Watson Edition Pump has been officially qualified after being tested in accordance with the USDA Forest Service Specification 5100-274E. The pump has passed the requirements of 5100-274E and the 100-hour endurance test in San Dimas, and is therefore qualified as of 08/04/23.
The assigned primary pump code is C-45-150/50. Alternate codings are C-45-175/40 and C-45-200/40. These pump codes will be indicated on the qualified products list (QPL).
NSN Numbers Now Available:
- NSN 4320-01-723-2109: PUMP UNIT, CENTRIFUGAL, NFES-0147 (Pump only)
- NSN 4320-01-723-2106: PUMP UNIT, CENTRIFUGAL, NFES-0600 (Pump with accessory kit)
- NSN 4240-01-723-2111: HARNESS, WATER PUMP, NFES-0314
Introducing the MyWATERAX Pump Dashboard Mobile App – your ultimate tool for real-time pump monitoring!
Stay in control of your MARK-3® Watson Edition with seamless Bluetooth® connectivity. The MyWATERAX app provides live performance insights, engine speed, temperature, and runtime—helping you optimize your pump’s efficiency when it matters most.
Key Features:
The app works on both phone and tablet, ensuring you’re always ready to tackle the next challenge.
Download now and take control of your pump in the field!
Maximum pressure
380 PSI (26.2 BAR)
Maximum flow
100 US gals/min (379 L/min)
Maximum head
877’ (267 m)
80 US GPM (303 L/min) @ 100 PSI (6.9 BAR)
70 US GPM (265 L/min) @ 150 PSI (10.3 BAR)
40 US GPM (151 L/min) @ 250 PSI (17.2 BAR)
Model and type
WATERAX W140, 2-cycle, air-cooled, Nikasil cylinder
Maximum Power
10.7 HP (8 kW) @ 8000 RPM
Maximum Torque
7.6 lbf-ft (10 N-m) @ 7050 RPM
Starting System
Recoil starter with backup manual rope starter
Type
Detachable, 4-Stage, Centrifugal Pump
Intake
2” Male NPSH
Discharge
1-1/2” Male NPSH
Dry weight: 44 lbs (20 kg)
Backpackable Frame
Direct Drive
Thread Protector Suction
Suction: 2” NPSH (Standard)
Thread Protector Discharge
Discharge: ¼-Turn Forged w/ Cap (Standard)
Fuel Connector
SAE 45 (Standard) & Mercury
Related videos
MyWATERAX Pump Dashboard Mobile App – your ultimate tool for real-time pump monitoring!
Introducing the New MARK-3® WATSON Edition Pump – Europe
How to - MARK-3 Watson Edition Modern User Interface Module (UIM)
How-to MARK-3® Watson Edition Pump Innovative Quick Release Clamp
How to – Starting the Engine on the MARK-3® Watson Edition Pump
Starting up the MARK-3 Watson Edition with User Interface and Engine Warm Up Indicator
Updated tech for fighting wildfires
MARK-3 Watson Edition Fire Pump Quick Release Clamp How-to Video - Part 2
How-to - MARK-3 Watson Edition Pump Padded Shoulder Straps
How-to MARK-3 Watson Edition Quick-Release Clamp Pump End
WATERAX - Mission
WATERAX Pumps - Innovating for Wildland Firefighters
The Next Generation of MARK-3® Pump
Introducing the New MARK-3® WATSON Edition Pump – A Modern Pump for the Modern Firefighter
Setting up the Pump - Wildland Pump Operations - MARK-3® Watson Edition
Finding the Right Pump Site & Tools - Wildland Pump Operations - MARK-3® Watson Edition
Troubleshooting - Wildland Pump Operations - MARK-3® Watson Edition
Wildland Pump Operations - MARK-3® WATSON Edition
Pump Layouts - Wildland Pump Operations - MARK-3® Watson Edition
Starting the Pump - Wildland Pump Operations - MARK-3® Watson Edition
New Features - Wildland Pump Operations - MARK-3® Watson Edition
Shutting Down the Pump - Wildland Pump Operations - MARK-3® Watson Edition
Behind the scenes at WATERAX: MARK-3® WATSON Edition