View Full Version : RO unit won't stop running

08/11/2010, 11:06 AM
I have an RO unit that will not stop running water through it unless I turn off the input to it. Once I do this I can turn it on and it will stay off until I need to make more RO water. This is a dedicated reef unit and not used to supply the house/refrigerator....(I have another unit for that and it only runs when I take water from its reservoir.) So, anyway do I need a new auto shut off valve?

Buckeye Hydro
08/11/2010, 11:42 AM
Hi Z. When ASOV's stop working, its usually for one or more of three reasons:
1. The check valve on the permeate tube has gone bad and needs to be replaced.
2. The ASOV itseld has gone bad.
3. There is a small leak at the purified water output from the system.

If the ASOV is more than a couple/three years old, it probably needs to be replaced.


08/14/2010, 07:34 PM
I had a bad flow restictor