Is the ground floor of the block of flats below street level? Reason I ask is that I had an issue with our second floor flat. Kitchen sink would not drain. After much anguish we discovered that the block's drains emptied to a sewage tank from where the contents were linked up to the main sewer which is at street level. The pump had failed and the pump alarm also failed so nobody was any the wiser. How it took a second floor flat to raise the issue and not someone on the ground floor noticing it first is beyond me.
Is the ground floor of the block of flats below street level? Reason I ask is that I had an issue with our second floor flat. Kitchen sink would not drain. After much anguish we discovered that the block's drains emptied to a sewage tank from where the contents were linked up to the main sewer which is at street level. The pump had failed and the pump alarm also failed so nobody was any the wiser. How it took a second floor flat to raise the issue and not someone on the ground floor noticing it first is beyond me.