Megaflow durso issues???

[fkshiu]

It would involve a bit of work, but have you ever tried the "Herbie" system which works well for megaflows? Here's a few pics of mine in my external overflow box:





One hole is used as the main drain (the short one) while the other taller standpipe is the emergency drain. The main drain flow is adjusted with a gate valve until the water level is just at a trickle going down the emergency drain. Water return from the sump goes up and over the back of the tank.

Took a bit of adjusting, but now it's dead silent. All I hear is the hum of my skimmer.

[Raf]

Thanks for the tips.

Yeah, these are adjustable but when I lower one, the level just goes down to the new level and still drains down these holes. Not sure the function of these holes but they are PITA!

I may have to plug them or make a DIY durso cap.

[Moose]

The gurgal sound could be air trapped in the line I had the same drain lines before and that would happen some times. I would put two ball valves on the drain lines one each that is so you can regulate the levels in the overflows without having to cut anything and as well this will most likely cut back the nose especially if you run the water high in the overflows. The holes are there to prevent back syphoning and should not be under water just the screen on the elbow

[Lofus]

I'm having the same issue with my Megaflow durso. I've just moved to a 92 corner with then overflow in the back corner and talk about your insane gurgling noises!

I had a DIY durso in the old tank that worked great. I suspect its those extra holes in the sides that are causing the issue. Anyone have any luck getting them to work quietly?

Jim