I just finished installing this Rennai natural gas tankless heater yesterday, and it's working well.
My only question is I'm wondering that if I ever get it inspected, will this T&P release piping pass? I've added a slight bend in the pipe in order to use a preexisting exit hole, but the slight "detour" the water has to make could be considered an obstruction.
I'm based in Texas, if that helps. I'm more concerned about safety honestly than the code, but they go hand in hand.
If you don't have a threaded end (that could be capped) there's nothing there to be an obstruction (of course, you could glue on a cap and obstruct it, but code doesn't get into that, normally. they do specify a plain end with no threads.) Simply having elbows is not an obstruction, though it does add some dynamic head .vs. a straight pipe.
In my area it would have to be metallic for at least the first 3 feet from the heater. That may not apply in your area. If it's used in ernest, water hotter than CPVC is rated for may be flowing through there. Many areas seem to think that's fine, though.
No…..only one 90 degree bend piped to within six inches above the floor. Very specific in CT plumbing code
