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Tekmar Pump Sequencer (Stand-by/2 Stage). Pump Sequencer 132 is designed to operate 2 pumps by providing stand-by or staging operation. It can be used in a wide range of applications, including residential installations using a backup system pump to commercial applications that require energizing a second stage for increased flow or head. main function of 132 is to provide lead lag capability to a standby pump setup, or to provide staging capability for a dual pump installation. 132 can energize up to 2 pumps, as well as provide alert contacts that can be used in event of a failure.