I have 3 Venturi skimmers, from ultra skim I believe. And my system uses a cartridge filter, a pentair system3 s8m600. Has one pump that's variable speed and there is a valve that changes from the main drain to "skimmer". When I change directions the flow of water to the skimmer increases through the Venturi port, but I don't know if there is a suction side. I took off one of the pvc pieces to reveal a hole on the bottom of the basket, but it has no suction. Is this because there's 3 and I would have to plug the other 2?
I'm essentially trying to figure out a way to hook up a manual vacuum so I can vacuum all the dirt that gets blown in my pool, without creating a cloud from trying to brush it all to the main drain.