There are an incredible array of garden pressure sprayers on the market, from small hand held models to large backpack types, and all of them need to be pumped up in one way or another. The only way of pressurizing a sprayer of these kinds are using the supplied pump handle, but again, they come in many different types, sizes and even materials like plastic or metal. However, no matter how they are used to add pressure to a garden sprayer, they all pump in virtually the same way.
Fill your garden sprayer with water about half way to the top. This is a good place to start for pumping and then later for testing the spray action.
Pump your sprayer about 10 times with the pump handle. For hand held sprayers, it may be a simple finger hold handle on the top. For larger garden sprayers, it will be a handle that you can grab fully with your hand, and for many designs of backpack sprayers, there will be an actual pump lever that juts from the side and is easy to grasp.
Every pump will take a bit more effort as the pressure builds inside of the sprayer. Plastic pump handles need a bit more caution the more times you pump, since pressure and therefore effort will increase which may cause the actual pump handle to break.
Always follow manufactures directions on how many maximum pumps will be optimum for satisfactory spraying. Once pumped up and ready, you may test your sprayer by spraying water on cement to determine the coverage. Adjust your nozzle for a fine mist, a powerful jet or anything in between.