I have my RO/DI unit plumbed directly to my sump with a float for top-off. (yes, I know this isn't ideal. But I have measures in place to alert me to a failure and possible flood that would ensue.)
My question is that my RO unit makes a whining noise when the float drops just enough to start making water. If I shut the RO unit off completely and let some water evaporate from the tank it won't make this noise when I turn it back on as it is refilling a larger volume. It only does it when it is just barely dropping below the float.
Any ideas of what is causing this? A lose fitting on the filter? Something to do with the pressure in the lines?
My question is that my RO unit makes a whining noise when the float drops just enough to start making water. If I shut the RO unit off completely and let some water evaporate from the tank it won't make this noise when I turn it back on as it is refilling a larger volume. It only does it when it is just barely dropping below the float.
Any ideas of what is causing this? A lose fitting on the filter? Something to do with the pressure in the lines?