First launch - premature epoxy fail

[Mike C]

Previously pressure tested to 80psi.
But on very first launch, at around 50psi the cap detached from the epoxy in the hose coupling.

IMG_2392.jpg (762.24 KiB) Viewed 9 times

I'm thinking that previous screwing and unscrewing had weakened the bond.
Previously I heard mention of hose couplings with an internal thread to fit a bottle.
Are these available, and if so where from?
Mike