Simple PVC Overflow

This is a simple overflow system that can be made in a few hours and by the way that is design there is not worries about breaking the siphon unless you completely empty your aquarium. The inlet is as close as possible to the bottom of the fishtank and the water level is control by the hight of the T on the outlet on my system the water level is about 2 inches above the drainage of the T. I did seal the intake and then drilled small holes on it to avoid sucking the smallest fish on the tank and since I used a 1 1/2 PVC pipe for mine to be able to keep up with the pump, I reduce the outlet from 1 1/2 inch to 3/4 of an inch ar the sump. To be able to quite the system I reduce the top of the T to about 3/8 of an inch and it work beautifull and no water noise.

I have tried others that I found online but all the other designs fail because the got to the point that will suck air into the system and will break the siphon. I was not able to sleep through the night getting up 4 or 5 time to check on the tank for overflowing signs, but since I built this one I have no concerns at all and sleep all night.