[jbird69]

I built one of those recently. It worked very well....at first. When I shut off the pump to do a water change and then turned it back on, I nearly had a flood. It seemed to take a minute to get primed, or tuned or settled into its flow rate, or whatever, but a minute is enough time to create a flood. I took it off. I went back to controlling my drain volumn with a gate valve for noise. I know some people dont like this idea but Ive never had a problem with it.