Help with outflow

[scherzo]

This won't work unless you drill a hole in your tank.

This can't sit on the outside of your tank because the bottom of the 90 (at the top of the pipe) must be below the waterline.

If you make an external overflow box where your existing hole is you are still limited by the size of the hole currently in your tank (so you won't be able to increase your flow).

You can't have an internal overflow box because your tank isn't empty. Adding an internal overflow box and keeping the location of your current hole won't solve your problem anyway.

I guess your final problem is that your plumbing needs to almost go horizontally so even if you were to drain your tank and drill a hole lower so you could run a durso, stockman, herbie...etc..etc.. the water would have to travel upwards to get to that hole in the wall to get to your sump (something that drains aren't designed to do... make water go up)

Sooo.. with the 90 at the bottom of this stockman picture that you provided.. the water would have to go up.. which won't work.. unless you had a siphon situation.. which means back to the DIY PVC idea... but keeping that siphon is always the issue with them. I'm using one now.. but I don't have to pump water back towards the water line of the DT so mine works fine.

Originally Posted by digi

Yeah, you're right.. thats where my problem comes from.. I didn't want to drill through my tile, so I drilled the hole in the wall as close to it as possible.

What your suggesting is what I was trying to explain... I was hoping to setup a stockman standpipe, although with a 90 at the end, like shown here:



Do you still think this won't work properly?

[digi]

Solution?
http://glassbox-design.com/2010/x-aq...out-wavemaker/

[golf nut]

why not run a siphon line over the top and use the existing drain for the emergency?you will have to check what happens during a power outage.