Superior Smoke Candles from Superior Signal provide visible smoke to detect faults at a longer distance. A fast, easy and inexpensive way to find leaks and faults in collection systems, laterals, and building plumbing, smoke generators are available in sizes to meet any need, from 30 to 500,000 cubic feet. Classic smoke candles and smoke fluid systems are available, plus blowers engineered specifically for smoke testing. 800/945-8378; www.superiorsignal.com; Booth 2631.