2 valve manifolds are designed for remote or separate mounting. Connecting from process side 1/2" NPT(F) and Instrument side 1/2" NPT(F) Connecting system impulse lines and transmitters, having simple two valves configuration which allows for easy block or Isolate, Bleed or Vent valve calibration of a static pressure transmitter or gauge. Bleed/vent connection with s. S. Plug will be provided on request.