You could probably do something similar and drill a hole in the elbow on your 2nd drain and stick some airline tubing in it. i have the airline tubing pinched in the overflow grate too, so if water level rises it will plug and create a siphon in case of emergency. on 2nd drain I run a T with a 90 at the end turned up and the top of the T has a cap on it with a hole drilled in it with airline tubing to further silence the drain. When running full blast, the 2nd drain has some flow going down it but nothing crazy. lower down i have the main drain connected to a valve to adjust flow. you wont see a better set-up bean overflow system than this :) Wallypops Member. Id start with a simpler design and move to bean animal when you expand which you will :-) slin1977 Member. ![]() I run a two drain overflow and dont run any pvc on the main drain in the overflow box, (got the main drain outlet circled in red in the pic). IMO while bean animal is the rolls royce, nothing wrong with a BMW. The elbows without a airhole might also create airblocks preventing the 2nd from drain from working? Like others have said, think the elbows would cause issues, likely getting a siphon going in the 2nd drain that then breaks siphon as the water level drops, then water level rises, siphon forms then breaks, repeating again and again. It never restarted and just gurgled all day.Īny ideas from those that run one what I'm doing wrong and how to correct it? Today is the water level in the overflow dropped low enough that the siphon was broken. I don't have the hole drilled in the elbow of the secondary, and can't figure out how it would help or if t's really needed.Įarlier in the week the water level came high enough to enter the emergency overflow, but I never adjusted the gate valve and it seems like the secondary drain never kicked in. The return pump is DC and adjustable and I have it dialed way down so it won't go over the rating of the overflow. The H2Overflow® Stealthbox® is the most versatile, silent, and reliable external aquarium overflow system available anywhere This Stealthbox® works great with the Seamless Sump, or any other sump system to maintain fish tank overflow. The pencil in the second picture is about the water level I think it should be at when running right. Both drains have their ends about 2" under water in the sump. ![]() The middle drain, I assume, picks up any excess from the primary as sort of a check valve to limit adjustments. The primary drain on the left has a gate valve to adjust flow. First picture is essentially what the overflow box looks like with the approximate heights of each. I can't get this thing working right and looking for some suggestions.
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