Hi,

Is it better to have a one line system or two line system on the typical oil
burner (line going to the head and to the tank). I read that a two line
system pumps more oil then is needed to fire and the rest is sent back to
the tank. I also read that a one line system is better for not rustling up
the sludge on the bottom of the oil tank? Are there pros and cons for both?
I read that the big guys are going away from two line systems because if the
line breaks you could pump a lot of oil into your boiler room.