The epoxy worked

Well now, I don't think I can remove the gauge because I put epoxy putty around it to try to seal it. I'm not sure if it worked or not, because I need a new valve to be able to pressurize it. I'm crossing my fingers and I don't know when I can buy a new valve, so I'm really nervous.

Thanks for the advise.

I recently finished building a pneumatic marble gun using a 1/8" threaded pressure gauge. I drilled the appropriate size hole into my air tank and tapped it accordingly. I covered the threads with plumber's tape and screwed it in. It is easy to turn and when I pressurize my cannon air is leaking thr...