panmanmatt
Well-Known Member
To start the siphon in the U-tube you need to insert the airline in through the bottom of the tube all the way up to the top of the U. Once there, you need to suck out the air until the whole tubes is full of water. This will start the siphon when you turn the pump on.
The siphon break hole in the return line is to allow air into the return when your pump is turned off. This will stop your whole tank from draining back into the sump. If it's not working that way, you may need to either increase the hole size or drill another one to allow more air in.
The siphon break hole in the return line is to allow air into the return when your pump is turned off. This will stop your whole tank from draining back into the sump. If it's not working that way, you may need to either increase the hole size or drill another one to allow more air in.