Did you say you were hooking your whole house up to RO water? If you are running RO water throughout your house do you have a huge holding tank? Since to make RO water it must go through a few filters and membranes it takes a while to make it even with the largest of systems. If you have that connected to your whole house then your will need a tank to hold enough to take showers, cleaning, cooking drinking and such.
It makes sense if you meant it was getting connect to your water system say at your kitchen sink. If it is getting connected you your whole house then I would almost think that you are having a softwater system installed which might include an RO system at your kitchen sink.
no biggied, was just confused.