Reverse Durso to Quiet a Noisy Drain
26 May 2008A common situation with reef tanks is the drain plumbing dropping down into the sump, creating loud splashing noise as well as spray caused by water hitting water.
Generally, noise and splashing can be eliminated by submerging the drain pipe below the surface of the water. Putting a pipe straight under water, however, can create other problems such as flushing, trapped air that causes the water to drain in a noisy rush. It can also create a siphon which can cause the unintended draining of water when the pumps are powered off.
The solution is to create what is commonly referred to in the hobby as a “reverse durso”. I’m not sure of the spelling of this. I’ve seen it spelled both Durso and D’urso. I think it is someone’s name.
In this video, I show how I did some quick plumbing with pvc connectors commonly available at your home improvement store.
I’m no expert, but it works for me. If you know of any improvements I can make, please let me know in the comments.
on December 16th, 2008 at 6:06 pm
Thanks for the great video. I have a HOB Lifereef overflow going from my main tank to my frag tank. Originally, I just had the drain going into the frag tank but it made a lot of noise and there were bubbles everywhere. Also had the hot tub effect of it bubbling over here and there. So I tried putting a reverse Durso on the end of the drain pipe. It stopped the hot tub effect but there are still a lot of bubbles. Plus, I woke up this morning to a lot of splash around the hole on the endcap. Have any suggestions? Do I need to drill a bigger hole?
Thanks