Sump Switch. LevelGuard is a submersible electronic sump pump switch designed to replace a mechanical float. Rated for up to 1?2-horsepower sump-pump applications, it mounts on the discharge pipe and sends power to the pump through a piggyback plug. It’s compatible with both new installations and retrofits but won’t work with an integrated switch pump system. According to the manufacturer, the switch will complete more than one million cycles without failure and last seven times as long as traditional float switches. It costs $130. TouchSensor Technologies, 630/221-9000, levelguardproducts.com