I've posted this on another forum, and they seemed to be very confident in the safety of 7th Floor tubing, and I've seen many other forums recommend them as "the place" to get tubing. So I thought I would come here for a second opinion. So, I'm worried. I've read that the 7th Floor tubing is food grade PVC tubing, which has low operating temperatures. Apparently food grade PVC only has an operating temperature of 150 F degrees. The other forum I posted on had the general consensus of "by the time it reaches the tube it's cooled down enough that you dont need tubes with 400+ degree operating temps". But 150F is far below 400+, and I definitely would not be surprised if it reaches those temperatures considering how hot the whip gets. Not to mention if you try using the whip without a tube (I tried it to experiment), if you put your lips slightly on the inside of the opening (similar to the area that the tubing rests in normally) it gets pretty hot. So I'm worried if that's actually true. I've used this tubing for probably about a year. I got my vape because it's a SAFER method than smoking, and now I find out that I may be endangering my health even more than smoking by using this??? I dont know how 7th Floor could have such a great reputation if this is true??? Even more disturbing is I have read that EVERY whip vaporizer ships with food grade tubing (which is confirmed by the few sources I've checked). If this is true then I think it's crazy how many people might have their health in danger due to this! Especially considering that the ones who got a vape are the ones concerned with their health! At this point I'm wondering if I should just use the damn thing w/o the tubing until I can get a shipment of some higher grade tubing... but is that really neccessary? I'm also a bit paranoid that I may have already caused serious harm by using this tubing and wondering if there are any medical tests I should get to ensure that my health has not been compromised... Hoping I'm worrying over nothing.