Roth Oil Tanks

Billduffy

I have a dual Roth oil tank system-two 275 gallon tanks that fill simultaneously. However, only one tank is sucking oil. The other remains on full. What is the problem?

Intplm.

They might be piped so that one tank favors the other. I would post some picture here of the supply piping to the oil burner from the tanks. Some close ups and further away.

EBEBRATT-Ed

If the suction lines coming out of each tank are tied together the tanks should equalize. Is you burner hooked up 1 pipe or two pipe? Pictures will help

EdTheHeaterMan

One of the fuel lines to the burner(s) has air in it. You need to create a syphon in the tank to tank fuel line so the fuel will be at the same level as one tank level gets lower the other tank syphons over to the other tank.

If one of the tanks ever runs out of fuel and the surface falls below the pickup lone of the syphon, then air will get in and break the syphon. You will need to reestablish the syphon again if that ever happens again. Sounds like you have to reestablish the syphon.

Can you take a picture of the top piping of both tanks so we can see how the Fill pipe, The vent pipe and the fuel lines are connected together?

Illustration to follow

EdTheHeaterMan

Is the supply fuel piping from the tank to the burner(s) installed properly?  Are all the fittings air tight?  Since you need to draw from the bottom of the tanks, both supply pipes need to go to the bottom of the tank, and the Tee fitting where both pick-up lines connect and proceed to the burner(s) must be as close to centered as practicable.  See this illustration and figure 5.4 from the installation manual. 

You may have a leaking fitting on the supply intake of one of the tanks. That will cause the tank without the leaking fitting to bull more fuel during burner operation and will break the syphon when the burners are off so the tanks do not have a chance to equalize