The Ring-O-Matic 850 Deep Vac is a powerful, pull-behind vacuum unit with the power to clean a 100-cubic-foot sediment pit to depths of 15 feet in about an hour. Mounted on a balanced trailer with 12,000-pound axle capacity, the unit tows easily by a standard three-quarter-ton pickup, enabling its use even in low-clearance tunnel washes and automatic bays. Collection tank capacity is 800 gallons. Vacuum power is supplied by a heavy-duty 230 cfm Masport rotary vane pump powered by an 21-hp, electric start, twin cylinder, OHV engine. A pneumatic load breaker and pressurized off-loading to handle tough waste are standard features of the units.