Cornelius Kegging Bits and Pieces

Each Cornelious keg has two ports/posts.
The "liquid-out" port or 'post' has a long tube which reaches to the bottom of the keg. The end of the tube sits in a small circular well that ensures that every drop is available.
When pressurised gas (Carbon Dioxide) is forced into the "gas-in" port/post, it pushes the liquid from the bottom of the keg, out of the "liquid-out" port/post.
Although we do not have a programmed schedule of cleaning or maintenance of the 'posts' we had some time while kegging our recent brews so we checked and cleaned the posts and tube.