I'm sure this question has been answered a million times, so I
apologize in advance, but I tried to find the answer. Also apologize
for the undoubtedly incorrect terminology.
I need to bleed one zone of my heat system. At the return, each zone
has a vertical pipe with, from bottom to top, a shutoff valve, a valve
with a water spigot and the pressure release (?) on the top.
What is the order for turning the valves?
I've watched the guy do it before, but can't remember the procedure.