Best Of

@BDR529, please follow site rules and be respectful of others. Thanks.

Not nice. This is called HeatingHelp.com. I don't see how your statement helps

Tom indicated that there are some different possibilities …and some others.

• Dirt fell into the fuel line during assembly
• Leaking flare connection
• Leaking pipe thread connection
• The draw tube inside the Roth tank is not below the liquid and is just drawing air.
• There is no draw tube inside the Roth tank
• The Roth tank valve (that looks like a miniature hand pump handle) is in the off position.
• There is a pinhole in the copper tubing between the tank and the tigerloop.

 I have a concern about your three tank descriptions.  This could be a recipe for disaster.   You may have it under control, but some day you may be on vacation, or in the hospital or just too old, and someone will “do you a favor” that does not understand how you have the tanks arranged.  They will open a valve and you will have all the oil from the outside tanks siphon into the roth tank.  Please tell me “that all the tanks are at the same level”  otherwise you may have this condition:

Of course if you have this setup, you are smart enough to never have all three fuel line valves open so the oil in the higher tanks can gravity flow into the lower tank then spill out thru the vent onto the ground.   I just wonder if your helpers will know that if you are not there for some reason when they do you a big favor and order two full tanks of oil so your pipes don't freeze while you are hospitalized …. you know what they say about no good deed