Markco described the effects of drinking distilled water. Ro is not pure like distilled. Ro can opereate at 1.1:1 and typically operates at 3 to 5:1 in home applications.

There are no other filtration systems that I am aware of that do not require any cartridges to be changed per the op request.

Z man. Be careful removing the chlorine before the tap. You can get some nasties growing from the faucet. It would be advisable to push bleach thru atleast every filter change