Mine did the same - leaked the first time out, and darn near ruined my FOURTH Diablo e-Pipe. Here's what you do:
Disassemble the Protank
Get some 1/2 inch TFE tape at your local hardware store, and wrap a small piece the same width as the threads on the threaded end of the tube that connects to the bottom. You will have to cut the TFE, and it is not easy,, but a roll should cost no more than $2.
Put the glass in and screw the bottom on.
Fill the tank and set aside.
The coil carrier might need one fix as well - get an old coil, remove the gasket, flip it UPSIDE DOWN and install it over the flanged tube on the coil. this doubles the gasket, and seals out the tube if the seal was weak. Omit this step if you don't want to reduce airiness.
Screw the coil carrier in slowly - it will take a bit of force to compress both gaskets. Below should be a photo of my pipe... This bad boy does NOT LEAK AT ALL. Wish ya luck!
