WATERAX MARK-3® WATSON EDITION
The legendary high-pressure fire pump, reimagined. 30% lighter, 20% smaller, with Bluetooth connectivity and smart LED interface. Delivering up to 380 PSI and 100 GPM in a 44 lb backpackable package.
The Legend, Evolved
The WATERAX MARK-3® has been the gold standard in wildland firefighting for decades. The Watson Edition maintains that legendary performance while completely reimagining the user experience. At just 44 lbs—30% lighter than the previous generation—the Watson Edition delivers the same 380 PSI maximum pressure in a more compact, backpackable package.
The integrated carriage system with ergonomic padded straps reduces fatigue and injury risk during transport. A smart LED interface provides real-time engine status and troubleshooting, while Bluetooth connectivity lets you monitor performance via the MyWATERAX mobile app. The 4-stage centrifugal pump end delivers the high-pressure performance wildland firefighters depend on for initial attack, relay pumping, and mop-up operations.
Officially qualified to USDA Forest Service Specification 5100-274E, the MARK-3 Watson Edition meets the rigorous standards required by federal agencies and sets a new benchmark for high-pressure portable fire pumps.
Key Features
30% Lighter, Backpackable
At 44 lbs (20 kg), the Watson Edition is 30% lighter and 20% smaller than previous MARK-3 models. The integrated carriage system with padded straps lets you backpack the pump engine-side up or down.
Smart LED Interface
Real-time engine status at a glance. The LED visual interface shows operating status, warm-up progress, and troubleshooting codes. High temperature protection automatically safeguards your engine.
Bluetooth Connectivity
Monitor pump performance wirelessly with the MyWATERAX mobile app. Track engine speed, temperature, and runtime in real-time from your phone or tablet during operations.
Anti-Flooding Start System
Anti-flooding technology significantly reduces the risk of flooding the engine during startup. Combined with 50% less pull force and a built-in foothold, starting has never been easier.
What Makes Watson Different
The Watson Edition improves on the MARK-3 legacy in four key areas: mobility, safety, ease of use, and ease of start.
Mobility
30% lighter, 20% smaller
Integrated carriage system with backpackable frame. Option to carry engine-side up or down. Integrated carry handle for quick loading and unloading. Just 44 lbs dry weight.
Safety
Designed for firefighter protection
Ergonomic carriage system reduces back injury risk. Padded straps protect shoulders from bruising. Muffler heat shield prevents burns. Lighter weight reduces slip, trip, and fall injuries.
User-Friendliness
Smart and intuitive operation
LED visual interface shows engine status and troubleshooting codes. High temperature protection. Bluetooth connectivity for real-time monitoring via MyWATERAX mobile app.
Ease of Start
Starting has never been easier
50% less force required for pull start. Built-in foothold improves steadiness. Engine warm-up indicator on LED display. Anti-flooding feature significantly reduces risk of flooding engine.
Performance Specifications
The 4-stage centrifugal pump delivers class-leading pressure for high-head applications and relay pumping.
Pump Performance
Maximum Pressure: 380 PSI (26.2 BAR)
Maximum Flow: 100 GPM (379 L/min)
Maximum Head: 877 ft (267 m)
Pump Type: Detachable 4-stage centrifugal
Flow at Pressure
At 100 PSI: 80 GPM (303 L/min)
At 150 PSI: 70 GPM (265 L/min)
At 250 PSI: 40 GPM (151 L/min)
USDA Forest Service Qualified
Specification: FSS 5100-274E
Primary Pump Code: C-45-150/50
Alternate Codes: C-45-175/40, C-45-200/40
Tested: 100-hour endurance at San Dimas
Engine Specifications
WATERAX 140cc Engine
Type: 2-cycle, air-cooled
Displacement: 140cc
Cylinder: Nikasil-lined
Max Power: 10.7 HP (8 kW) @ 8,000 RPM
Max Torque: 7.6 lb-ft (10 Nm) @ 7,050 RPM
Starting System
Primary: Recoil starter
Backup: Manual rope starter
Pull Force: 50% less than previous models
Features: Anti-flooding, warm-up indicator
Foothold: Built-in for steadiness
Fuel & Compliance
Fuel Type: 2-cycle premix gasoline
Fuel Connector: SAE 45 (std) & Mercury adaptor
Spark Arrestor: USDA Forest Service approved
Sound Level: Max 107 dBA
Pump Specifications
Pump Construction
Pump End: Detachable 4-stage centrifugal
Max Intake Pressure: 200 PSI (13.8 BAR)
Compatible With: Existing MARK-3 water-moving systems
Interchangeable: With MARK-3 pump ends
Pump Connections
Intake: 2" Male NPSH
Discharge: 1.5" Male NPSH
Thread Protector (Suction): 2" NPSH standard
Thread Protector (Discharge): .25 Turn Forged with cap
Physical Specifications
Dimensions: 21.6" x 12" x 14.6" (549 x 305 x 371 mm)
Weight (dry): 44 lbs (20 kg)
Frame: Integrated backpackable carriage
Straps: Ergonomic padded shoulder straps
Applications
The MINI-MARK Watson Edition excels in applications where weight and portability are critical factors.
Initial Attack
The backpackable design and quick-start features make the Watson Edition ideal for rapid deployment on initial attack. Deliver high-pressure water to knock down flames fast with pressures up to 380 PSI.
Relay Pumping
With 877 ft maximum head, the MARK-3 Watson Edition excels at relay pumping operations in mountainous terrain. Chain multiple pumps to move water over long distances and elevation changes.
Mop-Up Operations
The 4-stage pump delivers sustained pressure for thorough mop-up work. The lightweight design reduces firefighter fatigue during extended operations along the fire perimeter.
Remote & Helicopter Operations
At 44 lbs, the Watson Edition is light enough for helicopter transport and sling operations. The integrated carry handle and backpack frame simplify loading and transport to remote locations.
Shop MARK-3 Watson Edition Accessories
MARK-3 Watson Edition (380 PSI, 100 GPM)
Watson Edition Backpack Frame
Integrated backpackable carriage system with ergonomic padded straps. Carries engine-side up or down. Reduces fatigue and back injury risk.
K3-W MARK-3 Watson Edition
The complete MARK-3 Watson Edition portable high-pressure fire pump. Includes SAE 45 fuel connector and Mercury adaptor. 380 PSI / 100 GPM. 44 lbs.
Watson Edition Pump End
4-stage centrifugal pump end for Watson Edition. Compatible with existing MARK-3 systems. Detachable design for easy maintenance and replacement.
WARTERAX
MARK-3® Watson Edition High-Pressure Fire Pump
WATERAX