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. As with the entire Hotsy line, all models in the 500 series are ETL safety certified to UL-1776, with Hotsy pumps backed by a 7-year limited warranty. A pressure relief valve is standard on all 500 Series models. Equipped with a 50′ hose.