Larry Booth, owner of Advanced Pumping Systems, Puyallup, Wash., created a pumping system that is especially useful for placing granular base material in confined areas. Consisting primarily of one main hydraulic pump, two auxiliary hydraulic pumps, an auger, and the blower, the entire system is powered by a 104-hp diesel engine with a 60-gallon tank able to keep the system running continuously for 14 hours or more. Pumping distances of 400 feet and vertical reaches of 150 feet have been achieved by Booth, with rates ranging from 10 to 25 cubic yards per hour. The system can be operated by two workers - one to monitor the pump and one to control the discharge hose.
After the material is placed in the hopper, the auger carries the aggregate particles to an air chamber, where the rotary blower feeds them into the hose. Although routine maintenance is required, Booth chose a cost-effective plastic hose because of its light weight. When situations such as 90-degree corners require even more flexibility, plastic hose lengths are replaced with lengths of 7-inch-diameter, 0.5-inch-thick rubber hose. A circular deflector made of metal can also be attached to the end of the discharge hose to better control distribution of the aggregate. Called a "catch-can" by Booth, this device directs the material straight down in a waterfall motion so that particles don't fly around the jobsite.