Thank you both, so much, for your prompt replies.

I was just out looking things over and seems my husband (of course I'll blame it on my husband) put the prevail chlorine pack in the dispenser backward. I think that is causing the pressure. The pack also seems a bit "pinched". I'm going to replace the pack.

In the meantime, the hose is not popping off, but really expands big time. I am hoping that is normal, as my previous hose did not do this. This one seems a bit more flexible.

I know it's a stupid question..... but should the hose expand once I turn the sytem back on.