OK, I am one of the lucky people that chose a builder that goes under within 7 months of your pool being built, so TFP is now my ONLY source of information... Albeit, it has alway been much better information!
So, My builder installed my sit-n-spa step, with 3 jets last fall. All was well. They helped me close the pool this winter. We didn't do anything special with the actual venturi system, just blew out the spa step lines and sealed for the winter.
So, since I opened the pool this spring, I can pump water to my seat, but when I open the twist valve that "activates" the Venturi system, I get no air. Actually, when I turn it on it has water flowing out of the venturi spin cap.
Thanks ahead of time, Chuck