Originally Posted by Post42K
I just double-checked and am definitely using the presta side of the pump and locking it in the right direction. I also tried sanding/cleaning and even the electrical tape but no luck. I did come up with an interim solution.
Sounds like the presta side of the head is shot. I use unthreaded valved Michelin tubes with my Topeak SmartHead and have never had a problem. I regularly pump to 130PSI.