I'm not sure if you can glue vinyl flex tubing to PVC. I've never attempted it. Now you could glue in a PVC barbed fitting at each end and attach the vinyl tubing that way. I've always used spa flex tubing in situations like this.
Good catch! I'm honestly not sure either about vinyl flex to pvc, but I can't say I've seen anyone use it just with the glue. Something to keep an eye on!




