The Ring-O-Matic 550 dual-pump combination jetter and vacuum excavator gives contractors and municipalities the advantages of a dedicated combination jetter/vacuum truck in a versatile compact trailer unit. It can jet and vacuum sewer lines up to 20 inches in diameter in spaces too confined for stand-alone jetters and vacuum excavators, or a carrier-mounted combo rig. Powered by an 81 hp Cat turbo diesel, it has a 1,000 cfm blower and can deliver 27 gpm at 2,700 psi up to 400 feet with its 3/4-inch jetter hose. Trailer axles rated to 16,000 pounds allow the 550-gallon spoils tank and 500-gallon freshwater tank to be easily pulled behind suitably equipped 3/4- or 1-ton trucks. 800/544-2518; www.ring-o-matic.com.