Mike Lamb Posted January 31, 2018 Report Posted January 31, 2018 What does an internal siphon gauge on a steam boiler do and is zero and optimal reading?
Bill Kibbel Posted January 31, 2018 Report Posted January 31, 2018 It supposed to measure the pressure in a steam boiler, but that type of gauge is usually worthless on low-pressure residential boilers. Code requires boilers to be supplied with gauges that measure 0-30 PSI. The 0 to -30 is there because some steam systems are set up to operate as vapor/vacuum systems. It would be much better to install a gauge that measures ounces to a few pounds as most residential steam heating boilers should operate at less than 1 PSI.
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