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- May 14, 2008
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Hi. I am planning a ~150 gallon display with basement sump. The current plan is 2x 1.5" drain holes in an external overflow box and 2x 1" return holes. Plumbing from the tank to the sump will include 11 feet of vertical, 5 feet of horizontal, and 6 or 7 90's per pipe. I want to use 2x Abyzz A200's one plumbed to each return hole. Abyzz has told me the flow with this plumbing setup should be in the range of 1300 gph per pump so 2600 gph for both pumps. If I do an Herbie style drain with one full siphon 1.5" drain and one emergency 1.5" drain just trickling will that provide enough flow down to the sump? I think it won't be enough to meet the 2600 gph of the returns. I am debating going to a Bean Animal drain not for the redundancy but for the increased flow to the sump. This chart: https://flexpvc.com/Reference/WaterFlowBasedOnPipeSize.shtml says 1.5" PVC has a flow rate of 2100 GPH which would be close enough if true.