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Diaphragm Pump Backpack Sprayer - 4 Gallon


Diaphragm Pump Backpack Sprayer - 4 Gallon

Quick Overview

Durable professional-quality hand-pump backpack sprayer with diaphragm style pump mechanism. Suitable for use with wettable powders and other abrasive materials.

Additional Information

Part No. 475-B
Manufacturer Solo
Availability Available


Solo Hand-Pump Backpack Sprayer w/ Diaphragm Pump

The 475™ is a virtually identical to Solo's popular 425® but it has a diaphragm pump mechanism in the place of the 425's piston pump. In practical terms, this means that the 475 is better suited to abrasive materials, since the diaphragm completely isolates the spray material from the inner workings of the pump mechanism. The other major difference is that the diaphragm pump develops a lower maximum pressure (60 PSI vs 90 PSI for the 425).

Otherwise, the sprayers share the same features that make Solo backpacks our number one seller, year after year:

  • High-density polyethylene tank with ultra-violet inhibitors allows for unmatched durability and ultra-violet protectionf
  • Large 4.2″ opening with filter baske
  • Shut-off valve and wand overall length of 28″ for hard-to-reach places
  • 4 ft. of high-pressure hose
  • Padded shoulder straps for greater comfort
  • The model 475™ is capable of producing up to 60 psi, with its rugged connecting rod actuated diaphragm pump
  • Diaphragm is made of high-quality material for its resistance to harsh chemicals and abrasion and its long life expectancy
  • Diaphragm pump is ideal for handling chemicals in wettable powder form, as well as liquid formulations