Drain-waste-vent system

no-no? The simple answer is that everything, all products have a purpose.

And the ABS or the generic white PVC DWV, its original intent was to be used for drain, waste, and vent.

It was never intended to be used for flue gas venting applications where it's exposed to elements of heat over a long period of time.

And so why use something that is not intended for the application? It doesn't make sense.