Return line

[allan]

Do we have in this hobby a venturi styled connector that only allows water to flow in one direction?

Looking for a in tank water return that will not flood the sump/fuge during a power outage.

[hobogato]

no one way valve needed, just drill a tiny hole in the return line just at or just below the water line. when the power shuts off, the hole allows air in and breaks the siphon.

[msmith619]

no one way valve needed, just drill a tiny hole in the return line just at or just below the water line. when the power shuts off, the hole allows air in and breaks the siphon.

Not wanting to hi-jack this post but I have a question. I have 2 Mag7s for seperate returns. The Durso return sucks air and 'gurgles' loudly as it returns to the sump. Can I enlarge the air hole or drill one above the water line in the return to allow air to escape and reduce the gurgling?

[ErikH]

Are your dursos above water level? If not you can attach rigid airline to some soft airline. Run the soft airline inside your durso and put a ruberband around the rigid airline to suspend it above the water line in your display.

[msmith619]

Are your dursos above water level? If not you can attach rigid airline to some soft airline. Run the soft airline inside your durso and put a ruberband around the rigid airline to suspend it above the water line in your display.

The dursos are 2-3 inches above the water. They suck air down the return into the sump. The noise is the gurgling in the sump. The hole for air in the top of the durso is very small, would opening up bigger help? Or, should I raise the return to empty above the water line in the sump?

[Bill S]

Take a piece of semi-rigid tubing and run it down the durso below the intake. That will allow the trapped bubbles that are making the noise to "burp".

[allan]

That's how I have my current over flow set up (siphon break), what I want to do is send a current from low in the tank through the bottom of the tank.

[allan]

soooo I'm thinking there isn't a single flow valve that I can use specific to the hobby?

[ErikH]

That's how I have my current over flow set up (siphon break), what I want to do is send a current from low in the tank through the bottom of the tank.



You could do that with pvc and hide it behind rock, maybe with some foam to make it look like a pillar? You could cap the bottom, to make the pillar extend to the bottom of your sandbed and put a T above it where you want your flow. You could pinch some pvc together by heating it up to help pressurize the flow, and glue it into the T as your exit for your flow.

[allan]

exactly what I had in mind, I envision a tube in the center to the top for my overflow, water return jetting out of the tube in two directions, cover the entire tube with LR. I'm going to do this with a 30 gallon (or so) and want to have a clear 360 degree visibility around the entire tank. Thinking about placing it in the library.

However, should power fail, I need to ensure that the display will not empty out into my fuge/sump and subsequently onto my floor. We have a device in anethesia machines that allow directional flow of air to the patient. I've thought about building something like that (perhaps with a rubber ball in an open chamber that will allow water out, but absent the pressure the ball seals the return line. I think what ever I construct would be significantly larger than a mass produced pipe with the function built in.

[ballardjr2000]

be cool to see if it works that would be a cool dyi

[ballardjr2000]

somthing you might like

http://www.plumbingworld.com/checkvalves_pvc.html

sizes from 1/2 to 3 inch i think