I'm replacing the baseboard heating units in the basement with new slantfin ones and I figured while I'm at it I should add something to bleed the air out when i got to re-fill them. I can flush the system now but I'm worried air will still be trapped in there so what's the best connector and placement to install to help prevent air in the system?
Sorry for the bad image, it's to show that the boiler and baseboard are on the same level. The pipe goes up from the boiler in the ceiling and then back down tot he baseboard. The baseboard then runs a long the wall and loops back to go back to the boiler the same way.