PVC overflow

[troni]

nope.
i tried the hole no needle valve and didnt work. tried taping the hole till no more gurgling and it worked whistling every few minutes, except when power shutoff it broke siphon like you said.

best i got is above water with 3/4 to 1 1/2 bushing. then 1 1/2 to 3" reducing coupling. and still gurgling but i'm on the right track i hope. also i have the cap with hole on.

i think my next option is going to be replacing the (valve to 90) to (valve to tee), better air flow down the last pipe.