I have a HVAC system that uses hot water and chill water primary and secondary loops. Each circulator pump has a differential pressure switch across it the purpose of which as I understand it is to shut it down in the event of a ruptured pipe. Because the differential pressure switches were not properly matched to the system, some of the pumps sometimes shut down under normal operating conditions because of switch bounce. I have heard that monitoring the current draw of the pump motors is a more reliable way to detect pipe breakage. Is this true? and does anyone have an opinion on which are the better of these monitoring systems currently on the market?