A pressurized storage tank for reverse osmosis product water is recommended for its ability to deliver reverse osmosis water to the faucet using air pressure within the tank. The system shut-off valve (sold separately), will automatically turn the RO system on and off as needed.
Water is stored in a bladder within the tank vessel opposite pressurized air. As the bladder fills, the back pressure increases until it reaches a pre-set pressure limit (as determined by the shut-off valve, sold separately), causing the shut-off valve to cut off the feed supply to the reverse osmosis system. Water will remain in the bladder until the faucet is opened, the air pressure surrounding the bladder will force the water out of the storage tank and a directed point of use. As water is used, the pressure will drop until the shut-off valve disengages, allowing feed water to the RO system to resume until the tank is refilled.