Welcome! Here are the website rules, as well as some tips for using this forum.
If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
I have d valves on some radiators on all floors. my question is had to return to supply house.com couple d valves for not closing and opening too soon as soon as heat goes off. I moved the good valve to radiators where bad valves were and it works fine. question is what would cause air valve to open as soon as boiler shuts down and radiator is still red hot.am I just getting bad valves from this place? also had to hit valves sometimes for it to close all the way and returned them now got problem of venting too soon when hot. forgot to mention also changed main vents to #2