DON'T USE PVC!!
Highly toxic fumes can come off.
I just went to True Value, it's like the 7-11 of hardware stores. I got a 3/8 brass pipe elbow and a 4 inch 3/8 brass pipe pipe (I know Pipe is there twice). Really simple, brass and easy to hide and take apart. I also got some pieces to make a bowl and now I have a tight ass new bong