[gyurko]

Hello,

I have this basic setup on a new 45 into a sump in my basement. Once I get the siphon going in the siphon pipe, it works great...until I shut off my pump. At that point, the siphon standpipe will gurgle until I take the cap off of the standpipe for a second, and put it back on. In a couple seconds the siphon starts, and all is good.
There's a couple differences in my setup from beananimal's, but I don't understand how they would matter. First, my bulkhead is 1", but the standpipes are 3/4. Also, I'm using a normal tee out of the bulkhead and not a sanitary-tee.
I've tried drilling the top of the cap and doing a tube into the overflow box. The thought was that it would allow air in to unlock whatever is keeping the siphon starting until there's water in the overflow which would block the tube and let the siphon start. That doesn't work. Only taking the cap off seems to do it.
Any help would be appreciated.

Thanks,

greg