WATERAX MARK-3 Essential Fire Pump with Integrated Fuel Tank

The MK3-EWS delivers the trusted high-pressure performance of the MARK-3 platform with the simplicity and durability of a fully mechanical system. Designed for crews who need a dependable, no-nonsense pump, it features an integrated 1 US gal. (3.8 l.) fuel tank that delivers 45 minutes of uninterrupted runtime at full throttle - 100% and 65 minutes at 75% throttle, ideal for rapid deployment, sustained operations, and field conditions where refueling interruptions are not an option.

Built for versatility, this pump excels as a primary, auxiliary, or industrial-use pump. Its compact format, rugged components, and tool-free operation make it an excellent fit for wildland crews, remote worksites, forestry operations, and emergency water movement tasks.

Flow Rate at Specified Pressure

• Maximum Pressure: 380 PSI (26.2 BAR)
• Maximum Flow: 100 US gals./min. (379 l./min.)
• Maximum Head: 877 ft. (267 m.)

Performance

• 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)

Engine

• Model & Type: WATERAX 140cc, 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

Pump End

• Type: Detachable, 4-stage, Centrifugal Pump
• Intake: 2 in. Male NPSH
• Discharge: 1-1/2 in. Male NPSH

Weight

• Dry: 51.7 lbs. (23.5 kg.)
• Wet: 58.1 lbs. (26.4 kg.)

Other Specifications

• Frame: Wrap-around (Standard)
• Drive Unit: Direct Drive
• Thread Protector Suction: Suction - 2 in. NPSH (Standard)
• Thread Protector Discharge: Discharge - 1/4-Turn Forged w/ Cap (Standard)
• Fuel Connector: SAE 45 (Standard) & Mercury