RO not producing any water

[DC519]

I have a problem with my reverse osmosis system not making enough water. It makes about a quarter cup of water and that's about it. I have changed the two carbon cartriges and the five micron. The RO membrane is about two years old. I have a booster pump to bump up the city pressure from 50 psi to 70 psi. The reject water line is constantly flowing but no product water is being produced. I also have about a five gallon storage tank with 24 psi on that. What could be my problem? Thanks in advace for any responses.

[Gary Slusser]

Probably the 24 psi captive air pressure, most RO tanks have 7 psi. Raising it reduces the volume of product water.

Test both the raw and treated water for TDS, if the reduction is less than say 50%, the membrane may need to be replaced.

Gary
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Doug Aleshire, Super Moderator 2

[DC519]

Thanks for the reply I'll try the things you mentioned.