Changing oil furnace to 2 line

[thunderhead]

I have a Beckett AFII oil burner. The tank is lower than the pump and I can only run a couple minutes before it gets air in the pump and have to bleed it out again. Manual says to use two pipe system if tank is lower. It also says to insert a plug in the pump. Where does this plug go? I am trying to attach a pic of the pump. I think the bottom two fitting are in and out, so after I find where to put the plug all I have to do is run a line from the outlet back to the fuel tank? TIA

[HayZee518]

there are two 1/4 inch pipe plugs on the bottom of the pump. the left one is the inlet, the right side is discharge back to your tank. your "normal" inlet as shown in red is plugged with a pipe plug. or a bleeder valve.

[NHMaster]

I the pump is a suntec pull the bottom plug marked inlet. You need the by-pass plug that came with the pump. It's a flush machine head screw (can't for the life of me remember the size) the screw goes into this inlet and then the plug.