Ray, I think the 1" PVC would work fine. Might even make the setup more rigid. The Loc-Line does not come in 1", the closest is 3/4". so I don't think use 1" PVC will help the air noise. But, more rigid is good. Looking at the picture of you vac hose, it doesn't look like it has a bleeder hole, it may but I can't tell. If not I think the ball valve would work fine in your setup. I bought my Loc-Line for here: http://www.modularhose.com/
It worked out to be a little cheaper than Amazon. You might check it, Amazon prices change often. The Loc-Line turned out to be more expensive than I thought. I purchased 2 of the kits, some extra hose, and some extra threaded connectors (to connect Loc-Lome to the PVC. The kits have a 3/4" nozzle and a 5/8" nozzle. I wish I have purchased some extra 3/4" nozzles so I could use them on all ends. Keep in mind I have set this up on two saws, so you will not need as much "stuff" as I did, unless you have two saws.