There are a number of different types of sewer cleaning equipment systems available. Some systems are dedicated units that focus only on the sewer jetting cleaning function and require a separate vacuum unit to remove the debris from the sewer line. Other systems combine the vacuum and sewer jetting functions into one unit. There are also trailer and truck mounted units. Truck-mounted units typically are designed to clean larger-diameter pipes while trailer-mounted systems are ideal for sewer pipes up to 20 inches in diameter.