This can be due to a clogged vent or improper piping behind the walls AND can be exclusive to this bathroom even though it's attached to others.

Without exclusion, I thank all contributors to this thread.  

We were exclusively online but we also met and talked to as many neighbors as we could and asked them to help us find someone they would like to live by. 

If the agent list a house under exclusive agent how will the agent handle selling the house since his/her  not guaranteed a commission when the house sells by the seller3.

However it was a primary residence you can qualify for the owner occupy exclusion (above) if you have lived in the house for 2 of the last 5 years.  

(b5) Exclusion for Certain Minor Activities in Residential and Farm Structures. – No building permit shall be required under the Code or any local variance thereof approved under subsection (e) for any construction, installation, repair, replacement, or alteration costing five thousand dollars ($5,000) fifteen thousand dollars ($15,000) or less in any single family residence or farm building unless the work involves:

Exclusive Listings are reserved for owner occupants. 

I started out with carpet, then moved to refinished hardwoods in older homes, then I started exclusively using Allure Vinyl Planks (glue ones).

Hi @Ashley Wilson,  my strategy is flipping exclusively in the suburbs and I have completed a few flips in Telford, Collegeville, and Souderton. 

I use them exclusively as my title company and they do excellent work, so if you're on the fence about which title company to use in the St.