Thanks Stuart, I believe this is what I got

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It attached to the shutoff and pressure relief valve. One side is a T for a
line I was going to run inside for the heater, the other is that quick
connect fitting.

Is that incorrect? might be getting somewhere finally!

I did redo the fill valve and standard 80% valve... So getting it in is no
problem, getting it out is the issue!

Thanks, for any guidance