Handheld and cart sprayers hold liquids in their carry-along or roll-along tank and pump them to their spray wand for dispensing. Also known as handheld pump sprayers, they have a lever control and a nozzle to regulate the spray. These portable, compressed air sprayers disperse liquid lawn treatments, surface-cleaning solutions, sealants, and more. They require draining and rinsing out before storage to prevent chemicals from damaging sprayer seals and valves.