18V ONE+ 15L Backpack Chemical Sprayer – Tool Only (OBS1815)

Do not leave liquid in the tank overnight. Always empty and rinse it after use to protect seals and extend pump life.

Replacement parts for your RYOBI sprayer can be ordered at your local Bunnings Special Orders Desk. Bring the unit’s model number, found on the serial plate.

Storing your RYOBI Garden Sprayer with chemicals in the tank is not recommended, as chemicals can be corrosive and may damage seals, hoses, or other components over time. This can lead to leaks or malfunction during future use. Always empty and…

You can use your sprayer for fertilizer and weed killer on the same day, but always thoroughly clean the tank, hose, and nozzle between chemicals to prevent contamination and plant damage.

To prevent battery damage, remove it from the sprayer, store it in a cool, dry place away from sunlight, and charge to 50–70% if storing for over a month.

Before first use, fill the tank with clean water, turn on the sprayer, and run it for 30–60 seconds to remove air from the pump and hose for consistent spray pressure.

After using herbicides, empty the tank and rinse with clean water for 2–3 minutes. For stubborn residue, use a mild detergent, then rinse thoroughly.

Dispose of leftover chemicals by following the label instructions. Never pour them down drains or onto soil—use approved disposal methods or take them to a hazardous waste facility.

After each use, empty the RYOBI Garden Sprayer tank, returning unused chemicals to their original containers if permitted. Rinse the tank, hose, and nozzle thoroughly with clean water—repeat if needed to remove all residue. Ensure the sprayer is…

No, you should always empty and clean the tank before storage to avoid compromising the seals.

The RYOBI Garden Sprayer is designed for consumer-grade home and garden chemicals like insecticides, fungicides, weed-killers, and fertilizers, but should not be used with corrosive, flammable, or sticky chemicals, or liquids hotter than 50°C. For…

If your RYOBI Garden Sprayer is leaking, first check that all connections are securely tightened. Leaks may indicate worn or damaged seals, which are consumable parts that require regular maintenance and replacement. Always clean the sprayer after…

If no fluid is coming out of your RYOBI Garden Sprayer, check that the inlet hose is correctly positioned and there’s enough solution in the tank. Inspect the nozzle and line for blockages—remove the nozzle (with the unit off) to clear any debris.…

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Uneven spray is usually caused by a clogged or loose nozzle or a low battery. Clean the nozzle, ensure it’s tightened, and make sure the battery is fully charged.