Originally Posted by
Jinker
Many pumps are rebuildable and fully serviceable. Try contacting a retailer that carries that pump and see if they can order you the part.
Many LBS's will stock the bits for the pumps they carry. I know Topeak, for instance, sells a rebuild kit for bike shops that comes as a tray with all the different 'little bits' to fix up any of their pumps.
I haven't had much luck with the local shops, but I've emailed manufacturers twice (Topeak once; I forget the other one) describing the problem and got the parts I needed, free, in a few days. Topeak sent me a whole new hose and chuck.
Or you could buy a Zefal and use it forever. My hpX is at least 15 years old and works like new.
I hate minipumps, by the way. I've owned four or five, each one supposedly the hot new model that solved all the previous models' problems, and they were all junk. One took more than 750 strokes to pump my 700x32s to 90psi.