Overflow problem, any engineer out there?

[Coleus]

So i plan to have my sump in a different room with my tank. The problem is the pipe that connecting overflow and sump wont be a straight downward slope. it will have to some minor upward slopes to get around the bathtub sitting in the middle, will this be a problem? Will this cause my water to overflow eventually.

I had a similar smaller setup before and where the overflow line has to go down and down and then go into sump. The highest point of pipe still much lower than the water line in my tank. But occasional i got the overflow problem. I never caught it, just got home and water is on the floor so i suspect that was the problem because the air get into the tube and it needs enough pressure to push that air. Is my theory correct?

Thanks

[RDNanoGuy]

As long as the pipe inlet in the overflow is the highest point in the line it should work fine. You will simply get some water pooling in the low spots of the piping if your return pump stops. Consider using spaflex to minimize flow losses from bends and minimize leaking joints.

[ScubaSteve]

Yeah, head pressure is measured from the inlet to the outlet of the pipe. Doesn't matter a whole ton what happens in the middle (assuming that the pipe is working under siphon). If you get air pocket building up anywhere it might cause some grief.

[monocus]

think of the drain trap in your sink-the pipe goes up and the water goes down

[The Codfather]

Why not use your bathtub as the sump? Think how easy the water change would be.....
Im just saying...

[Coleus]

Thanks guys.

With herbie overflow, i think i may get away with air trap inside the pipe.

Bob, I like your thinking lol