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- May 12, 2019
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Good post.Yup. Some use a solenoid. I use motorized ball valve. Use a Y connection (or similar) to pull air from two places. One pulling from scrubber and one pulling from just regular air.
Use the valve on either intake. I use mine on the "regular" air and its always closed, meaning the scrubber is being used the vast majority of the time. The valve will only open if the pH gets too high, to allow regular air to mix in and keep the pH stable.
When i orginally set it up I used two valves. One for each intake, but realized pretty quickly it was redundant.
I have two questions...
Why a ball valve over the solenoid?
And if are only using one valve on the fresh air and it's closed, when you open that valve to let fresh air in, aren't you still running some air through the scrubber?
I would think if you wanted to pin your pH and maximize the longevity of the media, you would need two valves so it's only either using fresh air or scrubbed air?