The 500 Series delivers rugged, yet affordable, cleaning power for a broad range of applications from agriculture to building maintenance. The sporty 555SS, with its stainless steel coil skin, is our most popular entry level hot water model-compact, evenly balanced, easy to maneuver, and engineered with the operator in mind. ETL certified to UL-1776, with Hotsy pumps backed by a 7 year limited warranty. Equipped with a 50′ hose. Hotsy, what the Pros use!