This Duotight inline regulator with a gauge can be used as a secondary regulator, coming off a primary regulator like the CMBecker or Taprite primary regulators. This allows you to serve at different pressures for different types of kegs. Keep in mind that this is probably not as accurate as a traditional secondary, it is a much more affordable option. These secondary regulators should NEVER be connected to a CO2 cylinder directly, they must be used with a primary regulator and that primary regulator should not supply more than 60 PSI (We recommend using about 40PSI). You will also need to make a connection to each secondary that you use. You would do this by using Duotight Tees until the last regulator and then use an elbow on the last regulator in the chain.