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.

Oversized Item Delivery Options

Since oversized items require special handling, we may need to provide a custom freight quote for your order and will contact you with an updated shipping rate.

Available options include:

✔ Delivery to your closest depot for pickup - default method
✔ Direct delivery - requires forklift on site
✔ Direct delivery with tailgate lift truck (extra fees apply)
✔ Forklift loading at our warehouse (no extra charge if you arrange your own freight)
✔ Direct truck delivery (available in Victoria)

Important Notes:

• Shipping costs vary by location and method
• Because of the forklift requirement, delivery to the nearest depot is the default option and will be the method used unless you contact us to request otherwise.

Business Delivery:

• Business delivery is available for commercial customers only
• If you select business delivery and your products are bulky, it is your responsibility to ensure you have appropriate equipment (including forklifts) to unload products from the delivery truck
• If you select business delivery and you are not a business, you risk your product not being delivered and may incur additional fees to retrieve your order
• Business delivery customers must provide a valid business address and contact information
• Additional fees may apply for failed delivery attempts due to lack of appropriate unloading equipment

Let us know your preference, and we'll arrange the best solution for you!

Important Note on Availability & Shipping

Our warehouse serves as our office and logistics centre rather than a retail showroom. Because we ship from multiple locations and manage high-turnover stock, not all items are available for immediate pickup.

Lead Times:

• In-Stock Items: Usually ready for dispatch the same day.
• Supplier-Dependent Items: Usually take 2–8 weeks to arrive, depending on supplier availability. Products from Adloheat may take 8–12 weeks to manufacture—they are made to order in Australia by a small business, and longer lead times reflect the care put into quality.

While we strive for fast delivery, some timelines are subject to supplier availability and are beyond our control. We appreciate your patience as we source the best quality gear for your project.

Biosecurity & Interstate Shipping Restrictions

Due to strict state biosecurity regulations, we are unable to ship some products to certain states and territories:

• Potting Mixes cannot be shipped to Western Australia (WA), the Northern Territory (NT), or Tasmania (TAS).
• Seeds cannot be shipped to Western Australia (WA).

Orders placed for these items to restricted states will be cancelled and refunded. It is the customer's responsibility to ensure that the items being ordered can lawfully be delivered to their state or territory.