I have a single story house, built in the late 40s, with a small kitchen and one small bathroom. I was up in the attic checking something and noticed multiple pipes running to the roof -- all located near the bathroom. I would expect one vent pipe but not sure why there are more.
Water heater and dryer are located in the garage, kitchen stove vents out in another pipe toward the front of the house, house has an old floor heater, so can't think of any obvious reason what these are for.
Anyone have an idea what they might be used for?