I know I should bleed the system of air, but will any air in the tank prevent the pressure release valve from opening?
I am installing a new hot water tank. I intend to fill it, and then bleed off any air, but am concerned that if the pressure is too high it will damage the tank before I can bleed it. I am trying not to have a open pipe to prevent damage to the room. And therefore would prefer not to fill (until water overflows) then fit the valve.