The pump itself proved to be a very dependable tool and we used it daily for at least two years. After eighteen months we overhauled it with a Rebuild Kit for Joe Blow. Not bad considering we used it in place of a compressor and we had several folks a week needing flat repair with all the thorns along the bike commuter path.
After researching the issue I found it to be a very common complaint regarding Topeak's so called "smart head". An affordable and practical solution is to replace the hose and head with one like the Sunlite Twinhead Hose Pump Kit.
Despite the criticism of that pump I still recommend it as a very good quality pump as I still occasionally use that pump which is approximately ten years old with only one rebuild kit having been installed. These days I use my Porter Cable Inflator on most of our bikes but keep that old pump around as a solid backup when needed.