Solo Backpack Sprayer 15L Model 425LC - Professional Manual Pressure Sprayer

Solo #425 Professional Backpack Manual Pressure Sprayer (15L)

The Solo #425 is the industry-standard backpack sprayer, renowned worldwide for its "built to last" German engineering and uncompromising performance. As the flagship of the SOLO range, this 15-liter unit is designed for users who need to cover large areas or handle heavy-duty agricultural chemicals. Featuring a high-performance piston pump, it can generate up to 90 PSI, allowing for a broader reach and finer atomization of liquids. Whether you are a professional landscaper, a farmer, or a serious property owner, the #425 provides the perfect balance of rugged durability, ergonomic comfort, and precision application.

Best For Professional contractors and acreage owners who require a high-capacity, high-pressure sprayer for the frequent application of herbicides, pesticides, and fertilizers over large areas.

Key Features

• Piston Pump Technology: Capable of reaching high operating pressures (up to 6 bar/90 PSI), making it ideal for tall trees, dense foliage, and using specialized nozzles.

• 15L UV-Stabilized Tank: A large-capacity, heavy-duty polyethylene tank that is impact-resistant and protected against the degrading effects of harsh sunlight.

• Chemical Resilience: Specifically engineered with high-grade Viton seals to handle aggressive agricultural chemicals, including RoundUp, fungicides, and liquid fertilizers.

• Ergonomic Backpack Design: Features padded shoulder straps and a contoured tank shape designed to sit comfortably against the back, reducing strain during long periods of use.

• Left or Right-Hand Operation: The pump lever can be mounted on either side, catering to both left and right-handed users for maximum comfort and efficiency.

Specifications

• Brand: SOLO (German Made)

• Capacity: 15.0 Liters

• Pump Type: Piston Pump

• Max Pressure: 6.0 Bar (90 PSI)

• Wand Length: 50cm heavy-duty plastic lance

Ideal For (Uses)

• Large-Scale Weed Eradication: Managing acreage fence lines and firebreaks using high-strength herbicides like No Grow 500 Gold or Tree Killer.

• Agricultural Crop Care: Applying fungicides or insecticides (like Liquid Carbaryl) to orchards, vineyards, or large vegetable plots.

• Pasture Improvement: Spot-treating invasive woody weeds or applying selective herbicides over large lawn areas.

• Horticultural Feeding: Distributing Troforte Liquid Plant Food across expansive garden beds or nursery stock efficiently.

Pro Tip: To maintain the high pressure of the piston pump, apply a small amount of silicone grease to the piston o-ring annually. This ensures a smooth pumping action and prevents the seals from wearing prematurely. Always de-pressurize the unit and rinse the tank thoroughly after using thick or "sticky" fertilizers to prevent the internal valves from clogging.