LBS does not realize how utterly clueless I am

[PamNY]

And just today, I changed a flat on my bike, so I felt all proud of myself. That is, until I tried to fill the new tube with air. I don't know why, but i just cannot get the darned pump head to seal right. I've been using it for almost 2 years, but all of the sudden I'm having trouble. I think it took me longer to fill up the tire with air, then it did to change the tube

Could it be the pump? I ended up replacing the head on my Joe Blow -- problem solved.

I totally flatted the tire the first time I tried to take advantage of "free air" at an LBS. I still don't know what happened.

As far as stupid questions, I asked a lot of mine in this forum, with great results, and no one was ever snotty.

[OakLeaf]

+1. Pump gaskets have a limited life. Most pumps are rebuildable so you can just unscrew part of the head to install a new gasket. But clamping on a new head works, too.

[Penny4]

Well, I took it to the store where i bought it and of course it worked fine when they tried it
However, right before i left the house to go to the store, I had taken it apart to see if anything looked broken (not that I knew what i was looking at), so perhaps it just needed to be tightened or something. Anyway, I did buy a new pump head while I was there in the event I need to replace soon.