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  • 16-11-2012 8:36pm
    #1
    barryby
    Registered Users, Registered Users 2 Posts: 9 ✭


    "i installed a solid fuel back boiler on to a central heating system with two seperate expantion tanks and when i filled it i turned off the cold feed on the central heating and lighted the fire all rades heating fine so when i turned on the cold feed to the central hot water was coming out the over flow on the soild fuel expantion tank and when i turn it off it stops how can i fix this
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Comments

  • #2
    jimjimt
    Registered Users, Registered Users 2 Posts: 278 ✭✭jimjimt


    Hello barryby,

    by right one expansion tank would be suffice for a heating system.

    But if you were to put in two, both would have to be exactly at the same level to prevent over flow. Is one higher than the other ?

    If that is not the issue, their is something not correctly plumbed.

    Cold feed in the wrong position perhaps.


  • #3
    barryby
    Registered Users, Registered Users 2 Posts: 9 ✭barryby


    ya thats it wat i thought myself the onle thing is there is 30 ft between the tanks so it hard to no how high they are . i was thinking one would do aswell would that be two cold feed coming out of the one expanstin for each


  • #4
    barryby
    Registered Users, Registered Users 2 Posts: 9 ✭barryby


    its a duel system with soild fuel and oil heating


  • #5
    jimjimt
    Registered Users, Registered Users 2 Posts: 278 ✭✭jimjimt


    The back boiler would have to get priority with the tank and cold feed and expansion.

    Is the other system an oil boiler ?

    To find the level for the new tank attach a clear hose low down on the cold feed and let it up high. The height the water stops at is the height of the water in the other tank.

    You can also use a bit of pex let it up high bring it down where it starts to spill is the height of the water in the other tank.

    Remember the height of the water is not the height of the tank but the height of the water in the tank.


  • #6
    barryby
    Registered Users, Registered Users 2 Posts: 9 ✭barryby


    yes it oil boiler i have the tank for that over it in the attic and the same for the fire so if i took out the oil one would i just bring the expantion over to the fire one


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  • #7
    jimjimt
    Registered Users, Registered Users 2 Posts: 278 ✭✭jimjimt


    If it is possible yes. If not get the two tanks at the same level.

    No harm to get a plumber to have a look and advise. Make sure the back boiler is set up correctly.


  • #8
    barryby
    Registered Users, Registered Users 2 Posts: 9 ✭barryby


    the back borler is working fine now i just have the cold feed for the oil turned off thanks for the info good help


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