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The Piston®

High pressure external piston

Specifications:

Type: Backpack

Working Capacity: 4 Gallons

Maximum Pressure: 120 psi

Working Pressure: 15-80 psi

Seals/ O-Rings: Viton/Nytril

Shipping Weight: 13 lbs

Pump Type: External Piston

Patented Pump: No

Repairable Pump: Yes

Use For:

Herbicides (e.g. Round-Up): Yes

Insecticides/Pesticides: Yes

Fertilizers: Yes

Chlorine-based: No

Diesel: Yes

Wettable Powders: With Kit 34 (optional)

Stains & Sealers: Yes

Oil-based: Yes

Solvent- based: Yes

Viscous: No

Features:

20" Brass Wand
47" Industrial Hose
6" Tank Mouth
Tubular Steel Pump Handle
Pump Handle Grip
Tank Mouth Strainer
Fan Nozzle
Shoulder Pads
Agitation with Kit 34 (optional)

Downloads (pdf format):

Parts Schematic

Instruction Manual

High Resolution Photo

The Piston offers exceptional spraying pressure - a maximum of 120 psi, and working pressure up to 80 psi. The unit is powered by an external piston pump that is an improvement over traditional designs. With a true four-gallon operating capacity, The Piston is able to handle both large and small spraying jobs conveniently and efficiently.

WARNING!

SP Systems Backpack Sprayers are NOT DESIGNED to be used with caustics, including: stripping compounds, acids, or any solution that may be FLAMMABLE or create its own HEAT.

A Better Piston Pump

Our pump has been retooled for better sealing and longer wear. The piston collar is made of a proprietary Viton formulation that offers the highest available resistance to chemical attack. The result is a pump that, with proper maintenance, reduces the possibility of leaks, even with wettable powders.

State-of-the-Art Operation and Convenience

We have been making and improving backpack sprayers since 1984. The Piston has been engineered and tested for quality, durability, and ease of use.