Durso Style Drain Whistling

[Lampshade]

Oh wow, that's way better. Nothing's comming out of the Tee, so that's proabbly sucking air in and making it worse. At the top of my duroso I've extended the down spout a bit where the water is drawn in. I threw a 5" piece of PVC on there just to bring the intake below the bubbles entering the overflow, might help a bit, but air's still added in the air holes at the top.

With the tee I wonder if adding a gate at the bottom and a piece of pipe going up would work. And adjudst the gate valve to make the Tee JUST start to flow over. Like this:

Tank
| |
| |
| |
| |
| |
| |
| |....__
| |....| |
| |....| | <Sump Water Line somewhere around here
| |__| |
| ____|
| |
| |
|X| <--Gate Valve
| |
| |
| |