What size flexiable tubing do I need for a 1 inch bulkhead? 1 inch tubing makes sense but that just seems to easy. Just want to make sure since this will be my second time plumbing my overflow and I don't want to do it a third time. I have a very small leak in my first attempt and I used PVC pipe this time so I'm thinking I'll use flexable this time maybe it will be easier.