1kwksvt
Member
Not the returns... I meant to say the ball-valves that are on the drain lines coming down from the overflows...
Those are gate valves. The dursos do make some noise at full power from the vectra and full open on the gates so if i close them off and create a full siphon they are silent. Now i do have 1 ball valve that drops into the second chamber of the sump. I wanted to drop some dirty water after the skimmer for the chaeto. If that doesn't work i can use it to run a chaeto reactor off tje return side