In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
I have a vexing problem on a pressurized glycol system in the Boston area. All of the 1" NPT fittings of my SunMax VHP tube collector headers are leaking - a slow weeping drip. None of the other threaded connections leak in the system, just those at the headers. I have attached either copper female adapters, brass 1" threaded couplings, or brass female unions screwed onto these header nipples - all three types leak in the same way. And even with the couplings it is only the header side not the other side of the fitting. I originally used just Loctite 580 on them, then took it all apart and used blue teflon and high-temp dope. Same leak. Any thoughts? SunMaxx just says dope and blue teflon. And avoid over-tightening. I have lots of systems and lots of IPS connections with no other problems. Is this a known SunMaxx issue?