I have attached a couple of pictures of my setup: the middle pipe is my syphon with the gate valve (sorry the pics are sideways, I have no idea how to rotate them). I just dont like the overflow in the middle. It is commonly referred to as the open channel. The second pipe acts very similar to a Durso because it is vented with an air hole preventing that pipe from being a siphon and making it quiet. For the time being it will be against a wall. The Bean design uses the same valve-controlled siphon drain as the Herbie setup. Wife wants a nice clean look so internal it is. You should put the open end of the blue hose in the top of the emergency overflow pipe sticking down in about an inch or 2 This way if water does enter the emergency drain pipe it will at the same time fill the blue hose and make the secondary drain pipe a full siphon and prevent a disaster. Decided against the external overflow because of exposed piping etc. Features: Slim and compact design to suit any aquarium set-ups only 1. Going to have the bottom drilled for the internal overflow. Fiji Cube’s external overflow box features a slim and safe design that offers another solution to perform your tank build. ![]() I'm pretty fed up so if anyone has any suggestions I'd love to hear them. The external overflow box is a popular overflow option for hobbyist to build their tanks into the next level. Home of the 'Bean Animal Silent and Fail-Safe Overflow System' and many more interesting things reef aquarium, engineering, electronics and even food related. The strange thing is that my open channel will create a full syphon no problem, but since I don't have a gate valve on it it just repeatedly empties the overflow, gurgles, fills back up, repeat. I went on the forums and made the changes they suggested: switched my 90 degree elbow for a 45, reduced the length that my hose is under the water in my sump to about 1" from the surface. However, the syphon is supposed to start on it's own (so if the power goes out and comes back on it will kick in). The syphon used to at least start if I fiddled with the hose where it came into the sump. ![]() I have been on all of the threads that say what to do, and it still is not working. typical flows for 1.5 with 3 or 4 feet of head is around 3 or 4 thousand. its all about the head height as that falling water is always accelerating and pulling more water in. I have a BeanAnimal overflow and for the life of me cannot get the syphon started. For that I need to know what type of 1.5' pipe and the amount of head (vertical distance between the start and end of your overflow pipe).
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