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radiators bottom-to-bottom or not

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aji
aji Member Posts: 3
I'm installing old(salvaged) radiators that were originaly piped across the bottom (gravity). Is it ok to pipe the rads this way when using a circulator or should I attempt to open the upper nipple to connect top-to-bottom? note:old victorian, ornate, matching pair, expensive, rusty rads.
I need to get maximum BTUs out of these things but I don't want to damage them.
Thanks

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  • Mike T., Swampeast MO
    Mike T., Swampeast MO Member Posts: 6,928
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    Bottom-bottom connections work fine.
  • Eric Johnson
    Eric Johnson Member Posts: 174
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    pressure test

    Be sure to pressure test them before installation.
  • Big Ed
    Big Ed Member Posts: 1,117
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    Beware of High Flow Rate

    Depend of system piping ,flow rate and size of radiator but it can go straight through . Rare but it can happen.You can plug up the next push nipple as a back up.
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