The 555HE is the most efficient hot water pressure washer in our line. It features a technologically advanced heat exchanger that takes water to higher temperatures much faster, saving time and money. The Hotsy 555HE is also lighter and smaller, making it more agile and portable than it’s predecessor, the 555SS. Other features include a triplex crankshaft pump backed by a 7-year limited warranty, pressure relief valve and 50′ hose. ETL safety certified.