hey i know this is pretty veague so sorry, i have an oil fired central heating and the boiler is in the garage. I had the boiler service when i bought the house around six months ago he totally took it apart and clean it which seemed a gud job. the problem i have no is that i have a lead that connect my boiler to my oil tank that seems to be leaking oil. the boiler will work and heats up the house just fine. it looks like the nut/bolt has come loose any advice? and how much should a new one be?