http://www.è.co.uk/holotank-2-user-and-filling-instructions ,Hello folks, I'm a 4 month old vapor and have chosen a mini pipe with a beautiful holotank 2 as my new love! my issue is that the darn thing leaks at the base where it screws onto the pipe mod when I fill it. I thought this was a tank but it seems that I need to treat it more like a dripper. Please feel free to challenge my terminology as I'm still learning the language. I'm a 48yr old momma and these things take time. The above link was what I've been using for info.