return flow and power outage?

[ladyfsu]

I want to put my return line a little deeper into my tank. Is there anything special I can do to it so that if the power goes out, it doesn't drain backwards and overflow my sump?

Thanks,
Laine

 

[mfinn]

Assuming you are using pvc for the return line, drill a hole in the line about 3/4" under the water surface. This will cause a syphon break when the power goes out.

 

[jim.l]

I use lockline with a Y ... one returns just under the surface, the other side of Y returns deep.

The hole in return works, but you must clean it out frequently.

 

[ladyfsu]

Alrighty I'll give it a try! Thanks!

 

[mfinn]

Also try and angle the hole down a little. I drilled a hole in a return line once, that was angled up a little and after a water change when I turned the return pump back on, water shot out, up over the top of the front of the tank. Had to plug the hole and drill a new one.