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oil lines

Is it a Roth tank with a Roth pickup assembly? If so they are prone to this sort of thing.

Other than that, try sucking oil through the other line.


  • Helgy_3
    Helgy_3 Member Posts: 40
    oil burner supply lines

    Question for you oil guys. Our company just installed a new oil fired forced air furnace. Could not get the air out of the lines. It is a two pipe system. The allen screw had been installed. What would be the indication that the two line were mixed up sup and return. When there dissconnected is there a way to know which is which, some sort of test. Please let me know. Thanks for the help.

  • Paul Mitchell_3
    Paul Mitchell_3 Member Posts: 12

    You most likely mixed up the lines. Easiest way is to switch them and check. Trouble is it must be an underground tank and the last thing you want is to switch the lines wrong and cause a leak in the ground. The other thing is one of the fittings you did may be sucking air. They should only be flares...hopefully you didnt do any compression fittings. Some of the older tanks were put in with the return line just in the top of the tank, not all the way down. Since your new unit probably has a mini pump you may run into a losing the prime situation after ou figure the lines out. If so you can rectify this with a tiger loop.

    Good Luck
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