Overflow problem, any engineer out there?
 

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

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.

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.

drain
 

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

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

Thanks guys.

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

Bob, I like your thinking lol

Ty, you will have a stagnant water issue in your emerg line if it's not constantly trickling

Is your plumbing issue due to something in the wall that can be modified to get around this problem ?

yeah, it was my fault because the tank was last minute decision and I did not have time to think thoroughly where things go. so now the only access for me to run the pipe from fish tank to sum is through a back of a bathtub which has limited space. And the bath tub is right against the frame and concrete wall can't think of any way to get around the problem :-(

Bath tub + big hammer = solution :razz:

Priorities dude, priorities...

or smash the tank with big hammer and everything is solved lol