Quote Originally Posted by davocean View Post
People do it all the time, but it could be an issue if you ever had a fire. Now you could do this in a shed outside, but your garage is supposed to be sealed off and not allow air to potentially breath fire into the main living area. Even if you use a hole saw and seal it, you have still have placed a tube that can breathe between the wall. This is why we have thicker drywall, fire rated entry doors from garage and other measures . It is my understanding this could deny your claim.
. ALL 100% CORRECT. To add, from a plumbers point of view, I would upsize your hole by 1/4" and use some sort of Hilti Fire system to keep your penetrations sealed and maintain your fire rating. This form of construction is done day in and day out. Although, using PVC in this installation is a fire hazard in that if PVC catches fire, it produces toxic smoke. BUT, Really all you want is an air tight seal around the pipe maintaining your fire rating be it 1-2 hours of a fire rating. You can go into google and look up Hilti fire foam or putty for drywall penetrations. Generally, you'll need at least a 1/4" of annular space around the pipe for minimum product installation. Hope this helps.