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Expansion Tank location

Rilver
Rilver Member Posts: 3
in THE MAIN WALL
Hi ,Am planning to add an expansion tank on my wood boiler,which is an open system. My boiler stands 5' high and am wondering if I could get away with having my tank placed about 1'off the floor or is it possible that the extra head could possibly creaete a vaccum and collapse my boiler?
Any help would be appreciated.

Comments

  • Ken_8
    Ken_8 Member Posts: 1,640
    Why are you

    considering an expansion tank on an "open" system?

    What's wrong with leaving it as is?

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  • Rilver
    Rilver Member Posts: 3


    reason I want to add a tank,i'm hoping if I keep the boiler full of water to the top preventing any corrosion on the top of the water jacket.hopefully it would last longer.
  • Rilver
    Rilver Member Posts: 3


    Sorry I have to backpaddle a bit here , it is not really a bladder type expansion tank I want to add, it is just a tank with the pipe from the top of boiler going to the bootom of tank to suck up the water from tank if needed.
  • Joe Mattiello
    Joe Mattiello Member Posts: 720


    An expansion tank is used to except the thermally expanded water in the system. Precharging the tank to equal the cold fill pressure in the system is normal practice, so water logging the tank can be avoided. I don’t know what benefit gained by installing an expansion tank in an open system, unless you plan on using the tank as an accumulator.
    Taco, Inc.
    Joe Mattiello
    Technical Service Technician
    joemat@taco-hvac.com
    401-942-8000 X 484
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    Joe Mattiello
    N. E. Regional Manger, Commercial Products
    Taco Comfort Solutions
  • Brad White_2
    Brad White_2 Member Posts: 188
    If it is level control you want to accomplish

    why not consider an automatic level or pressure control system such as by Axiom or a McDonnell-Miller level control. The tank at floor level would not to my thinking suck water up to replenish the tank, unless a siphon is what you intend. Trouble is, the siphon could go both ways. Once the low tank is full it needs a vent run to above your waterline to equalize. Nah. Keep it simple. Axiom or M-M.
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