I have a fly high ballast bag and one of the ports is stripped. It there a way to fix this without having to replace the bag? I bought the boat used and apparently the previous owner tried to silicone the fitting into the stripped hole but it popped right out on me.
Flyhigh will fix your bag as well if you don't mind sending it to them. Plus they can upgrade ports, put more holes in it, etc. Pretty reasonable as well!
If you want a permanent solution, superfluous' fix will work. I've done similar with PVC cement from ACE hardware. A thick coat seals the threads for good.