This product is used to relieve pressure when transferring , filtering, fermenting, or priming beer. The PSI range on the gauge is 0-15 PSI.

When filtering: This connects to the gas fitting on the keg you are filtering into and has adjustable relief valve for letting pressure off as the keg fills up plus it allows you to read the pressure in the receiving keg.

This valve can be used to seconadary ferment directly in your corny keg and carbonate during the process.

Comes with gray disconnect.