How do you use a professional bug sprayer?

Question:I bought a bug sprayer with a pump and it didn't come with instructions.

Answers:
There are different versions...
But generally you push down slightly on the handle and twist counter-clockwise just a bit and it will come up. Then pump the handle up and down to build the pressure. Due to the pressure the pumping action is to to get harder and harder.

When you think you have enough pressure, push the handle all the way down and turn clockwise to lock it back into the lid. Now just pull the trigger on the sprayer and your liquid solution should come out.

When the pressure weakens to not be sufficient, repeat the process.