Would I still need to be concerned about carbon monoxide build up if I converted to a heat pump system for my home. I have no appliances that use gas. Could I then get rid of my carbon monoxide detector?
I agree that the allowable pressure for a 3/4 piece of sch 40 pipe is about 2000 psi but that can vary depending on the type of manufacture. Some galvanized pipe is seamless and most is not seamless. That can make a difference as can the temperature at which the pipe is operating. The type and rating of any fittings are also a factor. You can get fitting with a nominal rating of as little as 150 psi to over 2000 psi.
Ken is right about the stress cracks, I've seen it first hand. I use both, just a couple wraps/layers and then TFE paste with teflon. Hope this helps, and good luck.
2 wraps on plastic is fine.PTFE is a good choice.
