RO won't stop draining

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tdok

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Update: Nevermind. Somehow it stopped draining again. I'll chalk this up to user error.


Apologize if this was answered already - my situation is unique.

Today, after I changed my membrane filter, the RO keeps on producing wastewater for hours. The tank is heavy and full. I changed my membrane filter once before and the same thing happened. I don't remember what I did to fix it. Here are the few things I did to diagnose it.

Setup: feed is approximately 65 psi as controlled by a regulator right at input to the RO system.

1. Shut off the tank valve -- the draining stops.
2. Turn the tank valve back on -- it does not start draining again.
3. Turn on the faucet -- the draining starts again.
4. Turn off the faucet -- the draining continues and doesn't seem to stop.

What might be going on? Since the system stops when I turned the tank valve off, the ASV and check valve should be ok.

Thank you!
 
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