The video link is toward the end since it is a bit hard to describe the layout
I recently moved to a 90 year old townhouse in NYC. My garage occasionally floods (and sometimes when this happens the adjacent bathroom which is slightly more elevated floods as well). The flooding starts in a pit in the garage which overflows into the rest of the garage. I also get big roaches (you can see a caught one on the video) that crawl out of that pit. I have been told that the pipe that goes into the pit is not actually connected so I assume there is an open hole right beneath the pipe leading to the sewer system (which I guess is where the roaches are coming out from). There are also a couple of access caps which I have been told I could open to help drain the pit when it floods
There is a porch/terrace above the garage with a drain in the middle. It looks like there was original smaller diameter piping that connected the porch drain to the front gutter in the garage. The previous owners replaced that pipe with a wider diameter pipe that no longer ran underground and terminates in that opening over the pit
The problems I am trying to solve are 1. stop the flooding of the garage, 2. stop big roaches getting into the garage from the pit, 3. stop the adjacent bathroom from flooding
I have received conflicting advice from plumbers (ranging from valves that prevent backflow, to drilling into the concrete to directly install the gutter pipe underground). I wanted to see what you believe is the best option
Thank you
Video: https://streamable.com/q28b64
I recently moved to a 90 year old townhouse in NYC. My garage occasionally floods (and sometimes when this happens the adjacent bathroom which is slightly more elevated floods as well). The flooding starts in a pit in the garage which overflows into the rest of the garage. I also get big roaches (you can see a caught one on the video) that crawl out of that pit. I have been told that the pipe that goes into the pit is not actually connected so I assume there is an open hole right beneath the pipe leading to the sewer system (which I guess is where the roaches are coming out from). There are also a couple of access caps which I have been told I could open to help drain the pit when it floods
There is a porch/terrace above the garage with a drain in the middle. It looks like there was original smaller diameter piping that connected the porch drain to the front gutter in the garage. The previous owners replaced that pipe with a wider diameter pipe that no longer ran underground and terminates in that opening over the pit
The problems I am trying to solve are 1. stop the flooding of the garage, 2. stop big roaches getting into the garage from the pit, 3. stop the adjacent bathroom from flooding
I have received conflicting advice from plumbers (ranging from valves that prevent backflow, to drilling into the concrete to directly install the gutter pipe underground). I wanted to see what you believe is the best option
Thank you
Video: https://streamable.com/q28b64