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Drawing -Sharing oil lines on a Two-pipe system

I recall sometime in the past , seeing a drawing on sharing two -pipe oil lines.
If I recall, the return line from one burner would be the supply on the other.
Please let me know if anyone has also seen this!


  • Big Ed_4
    Big Ed_4 Member Posts: 2,828
    edited February 2023
    That is a bandaid for bad oil lines.

    The supply runs though the first pump and then the second pump would be set up two pipe with the return ..

    The stuff we did before tiger loops

    There was an error rendering this rich post.

  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 8,166
    edited February 2023
    Here are the drawings you are looking for. There are two. Did your read my post from 2 days ago when you asked this same question in another discussion?

    There are several more diagrams in the booklet I referenced

    If you are going to do this you may have trouble if both burners (Pumps) operate at the same time on the lower diagram because 3/8" copper may not be large enough to handle the flow of the entire pump gear set of 17 GPH (to 28 GPH depending on the fuel pump) times 2

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?