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tiger loops

we have an underground 1000 gal oil tank with a new furnace and oil fired h/w heater off the same 3/8" lines. we are having trouble keeping both running at the same time. has anyone ever used a tiger loop, or sid harveys similar set up to solve this problem can't find anyone with a yes or no answer but would sure like to use only one pipe from the tank so we can filter it thanks, sooty


  • Firedragon_4
    Firedragon_4 Member Posts: 1,436
    Post your question here and look out!

  • techheat_2
    techheat_2 Member Posts: 117
    You would need 2

    one for each unit,they work well. How about a preference relay?

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  • tate
    tate Member Posts: 21
    Tiger loop

    the tiger loop is the answer to your problem. Depending on the firing rate of the two oil burners, it will determine if you need one or two. I have been successful in running two burners off of a single unit, each was firing 1.35 gph. Just tee your suction and return line from the fuel pumps, and away ya go!
  • john_35
    john_35 Member Posts: 29
    tiger loop

    I have used one tiger loop to run two units to resolve this kind of problem. Put a tee on the suction side and two check valves(one for each burner); the return just needs a tee. Really the important thing is to know what your vacuum is! Are you dealing with high load or an air leak? If you're sucking air the tiger loop might still work but I would fix the air leak instead. Unless your tank is under a slab or something, that is.
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