[encantotom]

waste water goes into the sewer tank. same as with RO at home. it goes down the sewer.

most RO system makers claim 4 gallons of waste water to 1 gallon of RO water.

that is why the RO is only hooked up usually to a separate faucet on the sink and the fridge.

so it depends on how much ice and how much water you drink out of the separate RO faucet.

at home we probably do 1 to 2 gallons a day

tom