The Chapin 61800 4-Gallon ProSeries backpack sprayer is designed for fertilizer, weedkillers, Pesticides and general cleaners.
Pressure Per Square Inch (PSI)
With the 61800 you can select 30, 45, 60, or 80 psi. You can find the selector is inside tank, but remember that this is a manual pump and not a battery operated backpack sprayer so as your arm gets tired, you may not be applying a consistent force like a battery powered sprayer would.
The 4 gallon translucent tank makes it easy to see the amount of fluid held inside the tank.
The tank has a large opening to make it easier to add and drain liquid from the tank. It also has a strainer that keeps debris from falling inside the tank. They have also included an in-tank filter to prevent clogs from getting into the hose.
Padded shoulder straps makes carrying the tank a lot more comfortable.
The Chapin 61800 gives you a 25-Foot Horizontal And 23-Foot Vertical Spray Stream with each pump.
A 3-Nozzle Kit is included with each sprayer which allows you to spray from a fine mist, to a straight stream and to a broad fan.
There are hundreds of customer reviews on this page of Amazon that you can read.