Summitt Dweller

My outdoor spa/hot tub started leaking two winters ago so I took it out-of-service, and had the local dealer out to look at it this Spring. They charged me $120 for a visit, spotted an obvious leak, then told me they no longer service spas. 8^( The good news is that apart from the obvious leak, and a few top-side parts that should be replaced (easy fixes), the controls, heater and pumps all seemed to work properly. Not bad for a tub that’s got to be 12-15 years old. So I gave up on it and tried to give it away this summer. No luck. Two potential takers both backed out after realizing what it takes to move one of these. Now I’ve got it blocked up, cleaned up a bit, and am determined to at least take a shot at repairing the leak. I got under the tub tonight and found the obvious problem… and I’m not happy. There is a PVC cap at the end of a manifold fitting and the cap hangs lower than any drain on the unit. Duh, I wonder why it cracked? Really poor design IMO. I was prepared to replace or patch a section of pipe, but this thing has me scratching my head. Not sure if these photos will help, but I think you can clearly see the crack looking from below in the first photo…I didn’t even have to scrape away any insulation. The problem here is that in order to try and get the cap as high as possible, the manufacturer jammed it on tight against the manifold stubs, one of which is not even used. Got any advice for repairing or replacing that cap? If I cut it off there’s no manifold left to slip a replacement cap on. So my thinking is to either: A) clean the surface of the cap and place and glue a new, larger diameter cap (if there is such a thing) over it, or drill a hole in the end of the cap and/or force the crack to open up so I can (hopefully) remove the entire cap. If I can do that, do I have any hope of cleaning up the old joint so that I might be able to install and seal a new cap? Thanks for any wisdom you can share.