The line of DeWALT gas pressure washers is built with cast-iron sleeve engines, allowing them to withstand high temperatures and long run times. Each engine has a sensor that indicates when the oil is low and automatically shuts the engine down, preventing major failure and costly repairs. The DP2800, DP3400, DP3400HR, DP3750 and DP3750HR are equipped with commercial grade, heavy-duty pumps with ceramic pistons, brass manifolds and high quality bearings, which promote long pump life and offer users the right balance of pressure and flow for efficient cleaning. Each washer has 12-inch pneumatic tires for easy maneuverability. For more information visit www.dewalt.com or call (800) 433-9258.