For technicians at Diamondback Plumbing Services Inc. in Phoenix, Ariz., using underpowered equipment to break up heavy grease clogs in restaurant drain lines was like using a dull handsaw to cut down a tree.Now they relish the challenge. The company uses a trailer jetter that delivers 4,000 psi/18 gpm. President Steve Herzog estimates the machine increased drain-cleaning capacity by 35 to 40 percent.“We had been relying on cable equipment, and if that didn’t work, we’d try a small jetter,” recalls Herzog. “But it didn’t work on really heavy grease. We have a lot of Mexican restaurants here, so there’s a
