I've only had this for about a month now and it already has a leak. Not just a small leak... The tube developed a whole in it. This pump was taken care off and not abused. It was placed in a storage box when moved but still developed a whole. When it was working, there was a small back flow leak on the plunger. Also, adjusting tire air pressure by just 2-3 psi takes a while. I would invest in some thing with more quality. I thought I was saving money since I don't use the pump but a few times to make subtle tire pressure adjustments on my motorcycle tire.. I was wrong. I do not recommend