The LP400 delivers the durability of an Airlessco, with the simplicity of a mechanical pressure control system. It’s built on a compact, well-balanced triple chrome plated carry frame sturdy enough to stand on. The 400 is powered by a dependable fan cooled, totally enclosed DC motor. The heart of any sprayer is the pump, and the durability of the LP pump is legendary amongst professional\painters. It features the oversized“ Slow-Stroking” hardened stainless steel piston, & our patented triple-life packing system. The only packing system with external adjustment of upper and lower packings. No more getting stuck on the job with blown packings and a sprayer full of paint! Painter sprayers are a big investment. Don’t settle for equipment that isn’t, “ Built to Perform. Built to Last.”