PVC fumes are seriously toxic, as in potentially fatal. Its actually becomming a big issue because so much is used in buildings and in the case of fire people can die from the PVC fumes long before the fire or smoke kills them. I've done a lot of work with PVC and will often heat it up to make it soft and bendable. Whenever I do I use a big exaust fan, make sure the area I'm in is really well ventilated, and wear a mask.

Depending on how you design your bong you may or may not have a problem. But why chance it. Find some acrylic tubing instead. Its a little harder to work with but will be a lot safer. Plus the clear acrylic will look a lot better than white PVC. Look in the phone book under plastics and start calling.
Fengzi Reviewed by Fengzi on . PVC bongs safe? Last night I mentioned in a different thread that I'm thinking about building a PVC bong. I googled to see if anyone else had put their designs for such a bong online, but all I found were sites saying to never make a piece out of PVC because the resulting fumes are toxic. However, many said that as long as you don't use PVC for the bowl (which is obvious) you're fine. I'm thinking this will be perfectly safe to use as long as the bowl is made from glass or metal and is a few inches away Rating: 5