How low was your full siphon? That’s what I am trying to figure out. I’m also not 100% on where my second set of drain pipes should empty out since there are only 2 spots into the socks.I tried going Herbie with mine when I set it up. Couldn't keep full syphon and gave up, went back to just Durso. Probably because of the distance to my basement sump. Hope it works for you.