The tube that connects my oil tank to the central heating boiler seems to have started leaking...?

Question:How do I replace it without getting an air block in the line?

Answers:
<>When you replace the line hook up the tank end first and allow a little oil to flow out the furnace end before you hook up the line. This will eliminate most of the air. What is left will be of little consequence. Also, there is usually a filter screen at the oil inlet to the furnace and there may be a bleeder valve to siphon off the air.