Meaning of "stove piped"

also from politics

Low level information bypassing the usual examinations and fact checks and being passed on--stovepiped--to the higher ups.

This was done 2 years ago by the current regime installed in Washington, DC in the US of A which resulted in an invasion and a "war".

From the archives: Stovepiping at www.phrases.org.uk bulletin_board 34 messages 842.html