Size of Expansion Tank and Amtrol Fill-Trol

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Posts: 137
Joined: Sat. May. 17, 2008 5:48 pm
Stoker Coal Boiler: Keystoker KAA-2
Coal Size/Type: Rice
Other Heating: None
Location: Telford, PA

Post Sat. Aug. 09, 2008 11:09 pm

I'm gathering parts to install my boiler and I'm thinking of replacing my old expansion tank. It is the old type without a bladder. I think it is 15 or 16 gallons. 12" diameter and 30" long. I've not found on the web if a smaller one with a bladder can used or the same size must be used. I've found charts based on quantity of water in the system. Seems a difficult, time consuming thing to figure.

Is there some conversion table? or must the same size be used?

Also since the current boiler feed valve hasn't worked years I thought I might buy the Amtrol Fill-trol. Anyone have any comments good or bad about it?

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Stove/Furnace Make: Chubby Sr. Old School
Location: Winchendon,Ma

Post Sun. Aug. 10, 2008 7:21 am


For non-potable water in this chart show their largest @ 15" dia by 21 1/8" in length which is fatter then the one you have now but also shorter too. The chart takes
into account typical system water volumes based upon boiler BTU’s and type
of radiation installed. Simply go to the boiler output BTU equal to or higher
than the installed boiler, read across the chart to the correct tank model as
indicated by the type of system radiation column on the chart.

For potable water there is only two to choose from

This should help you in learning a little more about expansion tanks and the watts products.

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