Reverse Osmosis systems

[jean2]

RO water normally drops the ph to 5.5 or maybe 6.0 making it very likely to eat away metal pipes.
Cold water and RO's do not play well together, RO systems that say they can do 100 gallons per day are doing so with water that is 77F, now here in Alaska the water is mostly around 35F... so there is only about 35 gallons of product from that 100 gallon per day.
If there is iron in the water that will foul the ro membrane in short order.
RO's do better with soft water and not hard water, the harder the water the lower the out put.
A whole house system will need a buster pump to get the water pressure up to 198psi.

20 years ago I was running the bottle plant for a company, there was the commercial RO and Distiller.. and cold water.. city water with chlorine... and 8grains hardness, 1.5ppm iron...