Board Thread:Questions and Answers/@comment-99.97.89.40-20130224233536/@comment-6712373-20130225002436

I dont think teleport pipes work from the nether to the over world.

Try useing a Ender Chest and puting the lava into buckets to move the Lava between worlds.

Also did you place a chunk loader at both ends.(one in the nether, one in the over world)

And what are you using to pump the lava as you did not say in your comment.