Quote:
Originally Posted by untamed
Everyone here seems to really support the durso idea. I couldn't make a durso run absolutely silently, so I went a different way.
I use the "silent siphon". This method demands that your entire flow can go down one of your drain holes. You can test this by temporarily blocking one of the drain holes to verify the other can take the entire flow.
If that is the case, you put a gate valve on the one overflow and choke back the flow until it just starts to rise in the overflow box. As it rises up, it reaches an equilibrium steady state. You now have 100% of the flow going through that single drain with no air bubbles entering the drain. As there is no air entering, there is no sound. The drain pipe can exit underwater in the sump and there is no bubbling or splashing in the sump.
The 2nd drain is unusued. You put a standpipe on it so that if the 1st drain ever blocks, the 2nd drain will kick in and take the flow. That way, there's no risk of flood.
If you want to see it in operation, come by anytime. It is easier to understand if you see it working.
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I think I do understand actually. It makes sense. Plus I think that since my drains are both 2" and I do not want that much flow through my refugium and sump anyways, this could work for my set up. I think if my drains were smaller than 2" then it may not work as well. What size are your drains?
Thanks for the idea too.