There is no difference they are both cool
Pressure or gravity
If the water is flowing by gravity there is NO hydrostatic pressureIf you want to find the static pressure under no flow conditions take the constant .433 and times it by the height
because of overhead gravity, or local government water supply pressure pumping systems.
pressure in pipes
Steel pipes for high pressure is used.
If you require higher pressure higher wall thickness of pipe you should use sch 80 pipes.
Pressure has nothing to do with pipes freezing. It is just exposure to cold.
Yes as the short radius fittings offer greater friction losses
Tube and pipe are both used for conveying liquids or gases under pressure. They differ in how they are sized and their rigidity. A conduit is mainly used to protect and route electrical wiring.
low pressure lines
Pipe organs have different sized pipes because they can then make different sounds.
You have air in your pipes, possibly a ruptured bladder in the pressure tank