I think I received a kit that someone sent back or a defective kit. When I received my kit the threads in the air canister were a bit broken. I was able to get it not to leak. However, the compressor wasn't powerful enough to raise the PSI in the tank high enough to turn off the pressure switch, leaving the compressor just running. I replaced the kit with another one and the second kit I received was perfect. I suspect the original kit that was sent to me was returned by a previous buyer and was either unrepaired or resold as is.