![]() If these holes are all in a single overflow, the only things that apply are the bulkhead/pipe combination's, and what the pump is really going to pump. As far as what your 960 gph pump is actually going to pump, in your system, is subject to many variables, and will be somewhat less than the published figures. What will the single overflow handle without creating an issue. The flow rate these pipe sizes will handle are above your estimations, however your overflow size will be the limiting factor. In the second overflow, 1" emergency on the 1" bulkhead, and 3/4" bulkhead for return. With a couple adjustments, option 1 will work, those being a 1" siphon on the 3/4" bulkhead, and a 1.25" open channel, on the 1" bulkhead. There will be no flow in the second overflow. The emergency, and the return will be in the other overflow. With option 1, the siphon and the open channel must be in the same overflow, as they need to interact. Option 2 will not operate properly, if you have dual corner overflows. Īre my expectations/estimations reasonable? I'd appreciate any advice from somebody who has experience with this type of overflow. In this case, I would need to have my return line go up and over the edge of the aquarium from the outside.Īesthetically, I would prefer option #1, but not at the cost of significantly increasing my risk of a flood. Then use one of 1 inch holes as the emergency drain and the other 1 inch hole as the return from the sump.Ģ) use both of 3/4 inch holes as full siphons and one of 1 inch holes as an open siphon and the other as an emergency. I'm considering two possible configurations:ġ) use one of 3/4 inch holes as full siphon and the other 3/4 hole as an open siphon. I estimate that a 3/4 inch hole will drain at about 660 gph and that a 1 inch hole will drain at 960 gph (based on metrics from chart on FlexPVC site). The tank already has two 3/4inch holes and two 1 inch holes. ![]() I'm setting up a 180g reef tank and want to use a Bean Animal Overflow setup. Hi! (I'm a frequent lurker in these forums but this is my first post)
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