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Frequently Asked Questions Regarding Solo Backpack Sprayers

Since its launch into the market in the 1960's, the SOLO backpack sprayer has retained its pleasing appearance, efficiency and ergonomic design. While little has changed in the sprayer's physical appearance, it has undergone many significant changes in functional efficiency, materials and durability.

Often poorly imitated, the SOLO backpack sprayer maintains its worldwide leadership role through adherence to quality and performance standards that are widely envied. SOLO offers customers a wide choice of products and features including a choice of pump.

Do I need to buy a sprayer with a piston pump or a diaphragm pump?

The answer to this depends upon what you intend to use the sprayer for. As a rule of thumb: if you spray down, use the diaphragm pump it has a lower pressure with less drift and is good for weed killing. If you spray up, especially with a spray lance extension, use the piston pump, it has a higher pressure and produces smaller droplets, giving better coverage and canopy penetration. If you want to know more then read our article What Are The Main Differences Between A Solo Piston Pump And A Solo Diaphragm Pump Backpack Sprayer?

Will the plastic material last?

Yes. Only high-density polyethylene is used. The material is chosen for high density, high impact strength and excellent resistance to chemicals and stress. Ultraviolet inhibitors are used in the material to reduce deterioration caused by sunlight.

Is the sprayer comfortable to carry?

SOLO sprayers are probably the most comfortable spraying equipment on the market. The tank rests against the operator's back and the straps are made from a padded nylon webbing. The straps are easily adjusted within seconds. The pump lever is positioned at the most convenient height and can be varied with adjustment of the straps.

Can I use weedkiller and insecticide in the same sprayer?

In theory, you can if the sprayer is thoroughly cleaned out with a 1:25 ammonia/water solution. In practice, the use of both types of chemicals in the same unit is not recommended as the risk to the plants can be high. Use caution when handling any type of chemical and when cleaning your sprayer.

What spray nozzle should I use?

A flat spray nozzle is supplied for spraying paths, garden beds and for general area spraying. A cone nozzle is also supplied for spot spraying and for treatment of bushes and small trees. Other nozzles, such as a plastic or brass adjustable nozzles are also available. These nozzles can be set from very fine spray to a stream.

Can I spray for weeds between crops or ornamentals?

Yes, it is possible with the use of a spray drift guard and good care. SOLO offers an oval drift guard with a flat spray nozzle fitted. This is ideal for inter-row work or for killing weeds along fence lines.  There is also a smaller, round and translucent pro-spot guard which is excellent for spotting round weeds, such as thistles or dandelions.

What can I do to prevent drift while spraying insecticides or pesticides?

Follow the instructions of the chemical manufacturer for the safe use of their products at all times. Only spray when it is safe to do so i.e. when it is not windy! For best results spray early in the morning or at dusk when there is less air movement.

Can I do spot spraying?

Yes. The shut-off valve on SOLO sprayers is well suited for spot spraying. It is almost effortless! The handle incorporates a clip which holds the trigger valve open for area spraying without tiring the operator's hand. A pressure gauge may be added to the shut-off valve to control the output pressure.

Does the sprayer require constant pumping?

No. The well-designed lever action greatly reduces the pumping effort. The pressure cylinder within the tank has a hydraulic effect. Liquid from the pump compresses air in the pressure chamber, which allows irregular pumping action, yet results in steady spray at the nozzle.

Can the spray tank stand the pressure?

Yes. Although quite strong, the spray tank itself is intended only as a container for the spray solution. Pressure is maintained in a separate pressure chamber. This chamber is injection molded and built to withstand normal operating pressure.

How can I know how much I am spraying?

The output of the sprayer should be checked by collecting and measuring the spray liquid emitted during one minute. Maintain steady pumping on the pump handle while measuring. Having determined the output from the nozzle in litres per minute (l/min), the rate per unit area (l/ha) treated can be calculated knowing the spray width (m) and walking speed (km/h).

Volume (l/ha) =              600 x nozzle output (l/min)

                                                Speed (km/h)  x spray width (m)

Click to see our range of Solo Backpack Sprayers.