In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
I posted under "cast iron baseboard" a problem I have had with leaks. Since I travel quite a bit, I am concerned about a heating system leak (h/w) could do great damage. Is there any type of sensor or device that would sense the pressure drop due to a leak and close either the zone or the entire boiler feed? I'm not getting this across with the proper technical jargon but I think you'll get where I'm going.