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anti-freeze in heating system

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steve b_27
steve b_27 Member Posts: 20
in THE MAIN WALL
My relief valve occassionally opening on hot water heating system. Recently installed new anti freeze 50% in system .What are the things to check for?Does anti- freeze expand at different rate than water?

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  • kpc_45
    kpc_45 Member Posts: 29
    yes...

    you my need a bigger diaphragm tank(extrol)... I do not like antifreeze for thia nad other reasons... see glycol post. :(
    kpc
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