I'm closing in a 2nd floor porch to use as a bath/laundry room in a 1792 vintage stone home. The stone walls are 3 ft thick. So, I need to run the drain down the outside of the house in an inconspicuous location.
The house is in western Pennsylavnia where we often have winter temperatures well below freezing. An architect told me informally that this would not be a problem since the water supply pipes are routed through inside walls. But, I'm still concerned that the drain may freeze. At this point, I can't change the design. But, I could box in the drain and run a heater wire through it.
Does anyone have any experience with outside drains like this?