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My Culligan AC-30 RO system, original owner installed in 2000, started leaking to the drain last night.

It is very faint but noticable trickle you can hear when you are near the sink. When I turn off the water the trickle goes away. I don't have the airgap shown in the newer manuals. I have a line going from the filter manifold to my sink drain. Ideas?

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I believe as vague memory recalls their is a back wash or bypass of the ro filter system. Is the leak to the drain from a tube? or from the unit? IF you have a pump, the pressures are high entering the ro filter. If no pump they are no more than the city water. But given the age, plastic parts may be approaching their end of life. I Don't know what that is, but you might google this model and see if anyone is having these kind of problems.

Posted on Mar 28, 2015

  • epaiken Mar 28, 2015

    G, No pump just line pressure from curb. There is a small reserve tank but it has a separate line from the manifold. And yes, there is a line from the mainfold straight to my sink drain. None of the Culligan manuals I've been able to find are installation only, no troubleshooting ideas. I tried several search engines but most folks are experiencing leaks from thier connectors or filter housings. This one seems to be internal. If no one has any ideas I may just look at taking apart and see what the insides look like.


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