(Watch) How To Re-Inflate or Re-Pressurize A Storage Tank To A Reverse Osmosis (RO)

A reverse osmosis (RO) storage tank has a rubber bladder inside that holds the purified water. Pressurized air between the inside of the metal storage tank and the outside of the bladder squeezes against the bladder and pushes the water out of the bladder, through the tube between the storage tank and the inline carbon filter, through the inline carbon filter, through the tube between the inline carbon filter and the faucet, then through the faucet.

A storage tank should be re-pressurized if the storage tank has water in it but the water won’t flow out of the faucet. If a storage tank won’t hold air for a few months at a time it should be replaced with a new storage tank.

1. Turn off the feed water supply valve.
2. Turn off the storage tank valve.
3. Turn on the RO faucet to release pressure.
4. Disconnect the storage tank tube from the tee on the inline carbon filter.
5. Pump enough air into the storage tank to start pushing water out of the bladder. Continue to add air as needed to push all of the water out of the storage tank.
6. When all of the water has been removed from the storage tank, pump 5 to 7 psi of air into the storage tank.
7. Reconnect the storage tank tube to the tee on the inline carbon filter.
8. Turn on the storage tank.
9. Turn on the feed water supply valve. (It was take about 2 hours to fill the storage tank.)
10. When the storage tank is full, turn on the faucet to check the water flows strong out of the faucet and the storage tank will empty.
11. Check for leaks.

If the water flows strong and the storage tank empties and the storage tank stays pressurized for a few months then it might provide service for another year or more. Typically once a storage tank starts leaking air it only gets worse over time. Eventually the storage tank must be replaced with a new one.

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