Originally Posted by
rleahaines
I have used a check valve with the air pump on the floor of my cabinet without any problems. Now, the airpump manufacturers say you should not have the pump located lower than the water level in the tank or wherever you put the airstone.
The checkvalve I use is part of a dual check valve. Since I usually run it with the side not going to the scrubber slightly open, when the power goes off, there is no siphoning.
You can test this easily by setting stuff up and then taking the airline off your airpump. If you are going to get a siphon, you will see if it happens.