Mike sent in this query:
I have a 12-year-old Cal Spa with 2 4hp motor/pumps. The 2″ flex hose keeps springing leaks due to age. I have repaired it a half dozen times, but now it’s leaking where its too hard to reach. Is it worth the effort to replace all the 2″ flex? I replaced the pumps and motors a few years back.
Flex PVC has a history of this kind of behavior–springing leaks. Part of the problem is usually from incorrect glue. Flex takes a special kind of glue. You must use specially designed primer and glue for flex PVC.
Replacing all the flex PVC is waaaaaay too labor intensive. However, you can cut where the flex is leaking and replace it with schedule-40 regular PVC pipe. Be sure where you attach the schedule-40 to the flex that you use the specially designed glue I just mentioned.