Plumbing

Internal Soil vent pipe - reduced in size or remove and make external

Anonymous user 03/03/2024 - 3.42 PM

I would like to make more room in my bathroom for a new toilet/sink unit. The soil stack and vent are internal. There is a soil vent pipe that is boxed into the corner of the bathroom and I would like to either reduce the size of the pipe to make the new unit fit, or alternatively move the soil vent pipe so it goes outside. What is the smallest size this pipe could be if it remained internal? Would it be possible to just move the soil vent pipe outside or would the entire soil stack need to be moved outside too. I wouldn’t be doing this work myself and would be looking to hire someone. Many thanks for your help.