The stem Air Valve Switch modify the flow direction when the stem is pushed down or when it is released. Available as Normally-Open or Normally-Closed as 2-Way, 3-Way, 4-Way and 5-Way configurations. Offered with ports of 10-32, 1/8″ NPT, 1/4″ NPT, 1/16″ NPT, and 3-56.