The ryobi backpack sprayer needs to be cleaned up after each use. You don’t have to be lazy about. Cleaning it is just a matter of following a simple procedure. Cleaning it once should be enough but if you allow the chemicals to stay in the sprayer for too long, you may have to wash it more than once. Avoid dumping chemicals in ditches or on the public waterways. This can have a grave implication on people’s health. Here is how to wash a sprayer:
After spraying, clean the tank thoroughly. If some spray liquid is left inside, drain the tank completely.
Pumping causes air to be taken in and the remaining liquid to be discharged. Pump until liquid and air are coming out through the nozzle.
Refill tank with a few quarts of clean, soapy water and pump the water out as explained above (if necessary, repeat this procedure several times).
If the shut-off valve is removed, the pump can be flushed quickly. Improper spray distribution is the result of a clogged nozzle, which is easily removed and cleaned.
Soap and water may also be used to clean the tank.
Do not use aggressive cleaning agents or abrasives.
Follow the recommendations of the chemical manufacturer for disposal of wastewater and chemicals.
Activated charcoal in liquid or others may be used to absorb chemicals in tanks or spills.