Model S0000-FLW1 is a 1-1/4" NPTI DPDT double pole, double throw flow switch has contacts which allow for remote monitoring (by others) and audio/visual alarms (by others). The switch is installed in the water supply line prior to the emergency equipment and is activated once it senses the movement of water in the supply line.

Flow Switch and Enclosure: 1-1/4" NPTI, DPDT Double Pole Double Throw, 125 volt, 5 amp flow switch. The flow switch assembly is explosion-proof and weatherproof. Listed with UL & CSA, for the following: Class I Groups B, C, D Class II Groups E, F, G

Mounting: The switch is provided with a tee fitting for mounting the unit in the vertical position prior to the supply inlet of the emergency equipment.