because after my Joe Blow Pro failed, I brought it back to Performance Bike and they refused to warranty it. They said that the pump had a two year warranty and that because I purchased it 2 years and 3 months earlier, there was nothing they could do.

I was kind of mad, and planned to call Topeak and give them a piece of my mind, but they happily agreed to send me a new head free of charge.

About 3 days later the head arrived and the pump again works perfect.

Thanks Topeak!

UPDATE: see post 18. pump head failed six months later.