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Make sure you unscrew the presta valve first. There is a small top piece that must be unscrewed before you place the pump onto the valve. If all is correct, you should be able to press onto the presta valve and air will be released. Once your presta valve is open, place the pump nozzle over the valve with the locking tab DOWN. Press firmly (you might ...

First you need to make sure you have the right chuck setup. If the pump you have is the one in the link then it claims to be auto-converting between Schrader and Presta -- you can skip to the next paragraph. But if you have a slightly different pump it may require manual conversion. As you press the chuck onto the valve you should feel some resistance as ...

Answers so far seem to concentrate on floor pumps, but what I haven't seen recently is a full length frame pump that uses a hose connector. But 20+ years ago, that was fairly standard. I'd recommend getting a floor pump for regularly keeping tyres topped up, but you still need a pump to take on the bike in case of a flat. If you want an old style pump, ...

There are two main standards: Schrader and Presta. Schrader is the standard auto tire valve, while Presta is thinner and has a little knurled knob on top. Schader is relatively straight-forward to use while Presta requires a little finesse. Most newer "floor pump" valves are "agnostic" and will fit either style without conversion, but some require ...

A good quality pump will rarely have issues like this. You may have a very cheap pump, or you may have a pump which is designed for one of the other valve styles available. There are a few threaded valve fittings, mostly on fairly high end pumps. Lezyne and Scott Sports (Syncros) both make good pumps with threaded fittings which fit the 2 main valve types ...