RO System Question for everyone

[Ray]

I am thinking about adding RO systems and components to my product line, as it looks like I can get top quality components and still offer better prices than I typically see on the retail front. I believe I can offer 50 or 60 gpd systems for about the same price or better than most retailers offer 25 gpd systems. I probably wouldn't offer anything smaller, as the cost differential is minimal, larger-capacity systems refill quicker, and there's nothing that says you have to use the entire capacity!

The concept is to offer replacement components, as well as complete systems, but it's the definition of "complete" that's the sticking point, as I don't want to have to carry too many components.

The "standard" 4-stage unit on the market consists of a saddle valve to tap into an exiting water line, a sediment prefilter, carbon prefilter to remove chlorine and organic compounds, membrane with outlet flow restrictor, drain saddle for the flush water, auto shutoff valve, a 3- or 4-gallon pressure tank (that's the maximum amount of instantly-available water), and a faucet. Typically they are installed under a sink, with the faucet installed in one of the holes next to your normal faucet.

My own system does not use the tank or faucet, as I store the water in a large tank instead. Do you think it's worth including them in my own standard system?