Do not install the reverse osmosis system in extreme hot or cold temperatures. Temperature of the water supply to the reverse osmosis system must be between 40°F (4°C) and 100°F (38°C). Do not install on hot water lines.
The reverse osmosis membranes contain a foodgrade preservative for storage and shipment. New membranes should be flushed for one hour prior to use. This flush removes the preservative. The preservative is not harmful but makes the product water taste objectionable.