SOLO 425 - 15L Backpack Sprayer | Heavy-Duty Manual Sprayer for Garden & Farm Use

German-Made Piston Backpack Sprayer for Home & Farm

The Solo 425 Comfort is a 15 litre backpack sprayer built for gardeners, landscapers and farm use. Made in Germany, it uses a piston pump and a comfortable carry system, and it's designed for more intensive personal use as well as occasional professional work. The 15 litre tank means fewer refills over a big job.

Pump & Pressure

The 425 runs a connecting-rod piston pump, which suits higher pressure and thin, low-viscosity liquids. That covers most common garden and farm sprays such as herbicides, fungicides, insecticides and liquid fertilisers. A robust manual valve with a lock-on feature lets you spray without holding the trigger down the whole time, which cuts hand fatigue on longer jobs.

Tank & Build

The tank holds 15 litres and is made from thick-walled, UV-resistant polyethylene, sitting on a sturdy standing frame with an integrated fill-level marking. The Comfort range uses hard-wearing FKM (Viton) seals, so it handles aggressive chemicals without the seals breaking down. A large filling aperture makes it easier to fill, empty and clean.

Comfort & Handling

Padded shoulder straps and a contoured tank spread the weight across your back for more comfortable carrying on longer sessions. The pump lever is adjustable in length and can be rotated for left or right-handed use, and there's a large folding carry handle with an integrated spray wand retainer for storage and transport. The braided hose is sturdy and kink-resistant for a good working reach.

Key Features & Benefits

• 15 litre UV-resistant polyethylene tank on a standing frame

• Piston pump suited to higher pressure and thin spray liquids

• FKM (Viton) seals for use with herbicides, fungicides, insecticides and fertilisers

• Manual valve with lock-on to reduce hand fatigue

• Padded shoulder straps and contoured tank for balanced carrying

• Adjustable, rotatable pump lever for left or right-handed use

• Folding carry handle with spray wand retainer

• Made in Germany

Frequently Asked Questions

What can I spray with the Solo 425 Comfort?
It's suited to thin, low-viscosity liquids like herbicides, fungicides, insecticides, liquid fertilisers and similar solutions. Its Viton seals handle aggressive chemicals. It's less suited to thick or abrasive suspensions, which are better matched to a diaphragm-pump sprayer.

How big is the tank?
15 litres, with a fill-level marking so you can see how much you've got left.

Is it comfortable to carry when full?
It's built for it. The padded straps and contoured tank spread the load across your back, and the lock-on valve and adjustable pump lever reduce fatigue over longer spraying sessions.

Is it left and right-hand friendly?
Yes. The pump lever is adjustable in length and can be rotated to suit left or right-handed operation.

Where can I buy the Solo 425 backpack sprayer in Australia?
It's available online from BPG Supplies, with free in-store pick-up from our Bonnyrigg location in South-West Sydney.