Presair - Vacuum Switch, SPST 1/8in, 25A, 300in WC

VM12540E-300WI Standard Vacuum Switch from PresAirTrol is Vacuum Factory Set at 300 WI inches of water column. Single Pole Single Throw, SPST for devices under 25 Amps. EPDM Diaphragm can be mounted into a 9/16"" hole. Connects with 1/8"" male threads (which measure 3/8"" OD), and connects to 1/8"" clear vinyl tubing.