A Lack of Water Supply. As water expands when it heats up, expansion tanks need to be calibrated correctly to deal with this extra pressure. Only a professional with a water pressure gauge and an accurate reading of the house's water pressure will be able to set the expansion tank to the correct psi.
Oct 01, 2012 · or thermal expansion, it will try and absorb it. When a circulator is mounted on the boiler supply but is situated before the expansion tank, nearly all of the extra discharge pressure that the circulator is capable of developing will be absorbed by the expansion tank resulting in static fill pressure or less being exerted through the system
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Nov 20, 2016 · The photo at page top shows a modern Extrol(R) bladder-type heating system expansion tank. [Click to enlarge any image] Shown here is a gray cylindrical ceiling-mounted traditional bladderless expansion tank for a hot water heating boiler using cast iron baseboard heat in most of the building with a radiant floor slab in one small room.
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Jul 04, 2008 · Hot Water Boiler Expansion Tanks - There are two types of expansion tanks used on hot water boiler systems. The steel expansion tank and the bladder type expansion tank. These expansion tanks are used to provide a cushion for the expansion of water when it is heated.
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