the bleed line is the second of tom's dual venturi design. the line should be rerouted back to the return line, preferably before the pump's impeller. don't really need this, especially if your reactor dissolves most of the co2. it does add mist to the tank. water/co2/other gases will be constantly shot out of that bleed line because the reactor will be under constant pressure.
yes, those lee's air control valves will leak water, as well as those drip irrigation valves ime. i just run the line into my intake without any valves. i positioned my venturi a bit too high, so i would get misting after only a few minutes after turning on co2. now i 'm using about 20 ft of tubing (you can see it in the picture of my post in the "throttling back pump" thread you started), and it seems like half of the co2 is dissolving after making the trip from the reactor to the intake. you can always plug the hole, or to keep your options open, put a check valve on it.
yes, those lee's air control valves will leak water, as well as those drip irrigation valves ime. i just run the line into my intake without any valves. i positioned my venturi a bit too high, so i would get misting after only a few minutes after turning on co2. now i 'm using about 20 ft of tubing (you can see it in the picture of my post in the "throttling back pump" thread you started), and it seems like half of the co2 is dissolving after making the trip from the reactor to the intake. you can always plug the hole, or to keep your options open, put a check valve on it.
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