I have an RO system under my kitchen sink. It was there when we bought our house. There is no manual or paper work with it. It is a Culligan system. I just replace all three (3) filters and there is very little water pressure from it's faucet. There was very little pressure before I replace the filters, and I thought that perhaps the filters were in need of changing. The situation is the same.

Could it be the reservoir tank? Is it supposed to be pressurized? If so how much?

I have an RO system under my kitchen sink. It was there when we bought our house. There is no manual or paper work with it. It is a Culligan system. I just replace all three (3) filters and there is very little water pressure from it's faucet. There was very little pressure before I replace the filters, and I thought that perhaps the filters were in need of changing. The situation is the same.

Could it be the resevoir tank? Is it supposed to be pressurized? If so how much?
I think that type of system is for a separate spout just for drinking water. Usually mounted on the back of the sink.

Yes, it is. That is the faucet (or spout) that I am referring to. The water just barely runs out of it. My regular faucet has great pressure. So, I have to assume that it is somewhere in between? Thanks