This Tork 1101 indoor steel 24-hour dial time switch is typically used to control swimming pool pumping systems, with or without water heaters. This heavy-duty time switch comes with one pair of on/off trippers, but can accommodate up to 12 pairs of trippers and has a minimum ON setting of 20 minutes and a minimum OFF setting of 75 minutes. Featuring a temporary manual override switch, this time switch features heavy-duty contacts and has a five horsepower rating.