1/2 bowl of fresh Rivendell out of bag in my 1980's Erica System Pub Pipe (Pete 2nd) with 22mmx50.5mm chamber. I smoked slowly for 40 minutes before I had to stop. Based on tobacco left I am guessing I could have gone another 20 minutes therefore this seems to be a two hour minimum pipe. There was some moisture around the shank chamber walls from condensation but nothing in bottom. This was the driest smoke I have ever had ... none of my other pipes smoke this dry. I put a pipe cleaner down the draft hole when loading and packed a bit tighter. The dry system worked today. And Rivendell is always tasty but I did sneeze once from the burley.