The third red wire on the harness used to interconnect fire alarms so that they all sound when one is activated. Can I use the Ground wire to interconnect the two?
In a house - can be air in the pipes or a loose hanger that allow a pipe to hit a rafter or wall board. In a car - generally a loose hanger or missing. Sometime a bolt missing on the joining pipe fittings. Your personal pipes - bad digestion, eating spicy foods, too much beer.
I was fixing Mobile Homes in Alaska and then got a job drafting, so i went from being cold to a nice warm office
PVC piping is very inexpensive. PVC piping can range from .10 to $30 depends on length and how many connectors you need. Your local home improvement store is the best option to get pvc from.