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Small, portable, but powerful paint sprayers have revolutionized interior and exterior home painting projects, allowing handymen to give everything from houses to garages, bas, fences, sheds, and other outbuildings a thorough coat of paint in a matter of an hour or two, rather than days. These tools are straightforward enough for even fairly inexperienced people to get excellent results with them, and airless paint sprayers represent some of the strongest available today.

The airless paint sprayer is an advance in most ways over paint guns using compressed air to vaporize and shoot materials. Practical limits on air pressure limit the materials that a compressed air gun can apply to thin and some medium-textured types, while thick paint will clog the gun or emerge in clumps and spatters. Overspray is ample and these fine mist sprayer manufacturers  are usually best for small jobs in a paint booth.

Airless paint sprayers come in several different configurations, but even the smallest and most self-contained pack quite a punch as far as pressure is conceed. Diaphragm pump systems are intermediate between compressor and piston pump sprayers, but even their pressure is higher than that of air compressor equivalents. Airless systems with pistons offer at least 2,500 PSI and often as much as 3,000 PSI, which is one of their main advantages.

Having high PSI supplied by a mechanical piston shunting paint through the spray gun creates powerful suction, enabling the use of long hoses connecting the paint gun to a large material supply such as a 5 gallon can of paint. Even a small painter that squeezes the piston, filters, and other mechanical parts into the handheld case can pull paint through a ¼" hose from 25 feet away. Larger varieties can suck paint from as far away as 150 feet, letting you move all the way around a medium-sized building without needing to move your material supply.