Hey I am changing some radiators on a vented central heating system. Two radiators are begin fed rom the room behind which is the cellar. The pipes run through the cellar then up verticaly about 8/10inch to the go through the wall were the pipes run about 3foot to the radiator valve. I'm just wondering if I need to put RV 35S maunal air vents at the top of the pipes that run in 8/10inch verticaly in the cellar with it begin a vented system to try avoid air locks. Thanks for any help.