I'm working on the plumbing in my 2019 Hawk, and trying to figure out what the components actually are.
Doing this because I noticed that the lower end of the plastic tee on the water heater fill connection had been cross-threaded at the factory, and I want to fix that. I was really surprised that it was even water tight.
I was able to find the tee, it's from the Zurn QickTite PEX line of fittings. This is screwed into what I assume is a standard FNPT thread on the water heater.
So, I gather that these QickTite compression fittings just happen to have NPT threads, so that you can throw away the compression nut and run it right into the water heater. But it seems like a strange mix of systems, and sure enough I'm struggling to keep it from leaking slightly. I saw that FWC had used a whole lot of teflon tape, so I will just keep adding more wraps to see if I can get a tight seal. But being plastic, there's a good chance of ruining it if it is screwed in too tightly.
So, isn't there a brass fitting that would be a better match for the water heater fill?
Also, what is the trade name for the armored water line tubing with the crimped end fittings? Those fittings are really solid, with the enclosed rubber washers. Connecting these to the plastic fittings seems pretty flimsy; aren't there brass or steel fittings that could be used instead?
I've attached a picture of what I'm talking about. I also pointed out the check-valve which had failed and prevented the water heater from filling. They are easy to get at RV dealers and online, and it was an easy fix.