Thanks for the input guys. I'm pretty sure that my problem is that my solvent weld sucks. This is unfortunate because I have about $70-$80 invested in pvc. Oh well, this was my first build and I guess I'll just have to try again.

Hi, I recently built a PVC pneumatic potato gun but I'm having problems with leaking seams. I've tried pvc cement, guerilla glue, and black electric tape and was able to seal up most of the leaking seams but the gun still leaks air. Does anyone have any suggestions what else I could do to seal up th...

Thanks for the help guys.

So if I made the air tank larger than 15 inches why wouldn't the cannon have more power?

I am currently building a pneumatic potato cannon. It has a manual valve with a five foot long two inch diameter barrel. The cannon will have a six inch diameter air tank. I have ten feet of the six inch pipe and I was wandering how small I should cut the pipe for the air tank to make my cannon work...