Hot Water or Cold Water?
Cold water pressure washers handle such cleaning situations as dirt, mildew, and algae removal from building exteriors and sidewalks. Combined with a detergent injector, a cold water pressure washer will generally be sufficient. However, when you need to remove oil or grease, hot water is the only way to go. Hot Water pressure washers are ideal for removing oil and grease stains from driveways, removing oil and grease from heavy equipment, gum from commercial sidewalks, and practically any substance where removal is dependent on breaking down the molecular structure. (In other words, anything you need to "melt away")