Cannot get my overflowbox to fill and hold the siphon

[Tigerarmy]

I can't seem to get my overflow box to hold it's siphon and kep flowing. Half way through the night it seems to stop. any ideas please?

[Chin_Lee]

need more info ie - where is it located, how its it positioned etc. pics if possible.

[Whatigot]

is this an external u tube variety or something else?

could be air bubbles if so...
more details for better help please.

[The Codfather]

Best way to keep that syphon is with the aid of a vacuum pump, Tom produces one. Also watch the output of the pump, a difference in head pressure or water level will change the output of the feed pump.

[Borderjumper]

Originally Posted by The Codfather

Best way to keep that syphon is with the aid of a vacuum pump, Tom produces one. Also watch the output of the pump, a difference in head pressure or water level will change the output of the feed pump.

Sorry.. off topic, Codfather.. thats just the greatest name!

[aquatechy]

Hi there,

You might have something stuck in your over flow, whcih causes sediments to accumalate until they block the pipe, which causes the whole setup to stop. They can then drool down to your sump, so by the time you get in there to clean it up, it all gone.

Try giving the inside of your overflow a nice cleaning, if you can pull your pipe, clean it out too. If it is still causing problems, it is probably not the overflow, but rather a pump or something. Does the tank keep filling after the overflow dies??

[Tigerarmy]

Thanks guys, got the thing working.

[mark]

read to add a small PH such as a MaxiJet and attached the venturi line to the top of the U-tube and just leave it running all the time. Pulls out any air and helps maintain the siphon

[karazy]

im guessing this is an e-shopps overflow, and what im doing with mine is drilling a hole a little bit behind the peek of the U-tube and siliconing in some airline tubing connected to a aqua lifter pump