Hold it on the valve stem with one hand so that the air doesn't blow the Crack Pipe off. Pump with the other hand. Put your back into it.
The Zipp Crack Pipe connects to the Schrader side of your pump head if I'm not mistaken, but obviously works with Presta on the business end.
The Zipp Crack Pipe connects to the Schrader side of your pump head if I'm not mistaken, but obviously works with Presta on the business end.