Adding a DI chamber to an existing household RO unit?

[Triggz]

I am helping a friend add a DI chamber to their household RO unit. However, the unit is in the basement and I would like to hook up the DI on the main floor under the kitchen sink. This way I can easily "T" off the line where it comes up for drinking water, and hook up a reservoir on the main floor (where the tank is).

Does the DI chamber need a specific amount of pressure going through it? I'm thinking I'm going to lose a lot from the basement to the main floor. As far as I can tell my unit just trickles through the DI chamber so I'm hoping this will work.