Old Style Boiler Expansion Tank

Steam boilers are simpler systems that lack several components found in hot water boiler systems such as the circulating pump expansion tank and regulators for water pressure and temperature.

Old style boiler expansion tank.

A description of how the old style expansion tank provides a cushion for expanding water in a hot water boiler system. Other than that the old non diaphragm type of boiler expansion tank is fine. Replacing old style expansion tank hi i have a 1 story ranch with a forced hot water boiler with an old ceiling mounted expansion tank. The tank will work fine until it rusts out provided that it is maintained.

The tank is partially filled with air whose compressibility cushions shock caused by water hammer and absorbs excess water pressure caused by thermal expansion. An expansion tank or expansion vessel is a small tank used to protect closed not open to atmospheric pressure water heating systems and domestic hot water systems from excessive pressure. I have an old boiler in my 1868 brick house with the old style steel horizontal expansion tank. Draining water out of a waterlogged expansion tank is a common heating boiler service procedure used to replace a lost air charge.

This video is part of the heating and. An expansion tank is a pressure vessel designed to accept the additional fluid volume created as a result of heating the water in the system. Before we get into the common issues associated with plain steel expansion tanks and old air control systems let me first describe the expansion tank which is an integral part of any air control or air elimination strategy. Hot water heating system expansion tank compression tank drain procedure to re charge lost air.

The one in your picture looks relatively new. In that it has to be drained as part of a maintenance scheduled. So remaining life expectancy depending on quality may be 40 years. The expansion tank has had it.

This article describes the steps in draining of a steel compression or expansion tank used on hot water system heating boilers hydronic heat. To use these boiler expansion tank sizing charts you need to know just the type of heating system radiation used. I d like to replace this with a new bladder style tank due to a few pitted spots that look like they re about to spring a leak. I have patched the thing numerous times with epoxy putty but new leaks keep popping up.