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by Ono

The WATERAX OT-4NX is a modernized poly backpack pump that was conceived with the comfort and safety of the user in mind. The tank is made of lightweight yet rugged UV-resistant polyethylene making it easier to carry without compromising on durability. Ergonomics can be felt through the sleek contours of the tank, the integrated lumbar support, and the comfortable shoulder straps.




  • Height: 22.8” (580 cm)
  • Depth: 8.46” (215 cm)
  • Width: 15.8” (402 cm)
  • Capacity: 5.3 US gal (20 L)
  • Dry Weight: 8.5 lbs. (3.8 kg)
  • Wet Weight: 52.6 lbs. (23.9 kg)



Tank Features:


  • Made of UV and corrosion resistant polyethylene
  • Integrated lumbar support
  • Durable brass elbow fitting for hose connection to tank
  • Carry handle also functions as storage for the pump
  • Comfortable and ergonomic
  • Comfortable shoulder straps
  • Delivered assembled
  • Water level indicators (US Gallons & Liters)
For more information about this product or other Waterax products, please visit















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