Sub Pump Help!!!

MercedesSC2001

My neighbor says water coming from my drain caused his basement to flood. I live in a townhouse and I checked out my drain outside andI can't see how they are connected. I can see my drain running along my roof then down the side of my house and then a black extender going under my bricked patio. I have poured water in my sub pump and hear it click on. My neighbor stated that my drain runs to his sub pump in his basement and it couldn't handle water from my drain and his so it flooded ruining his basement. How can I tell if this is true? Also, how wouldn't we know that they are connected? Is that even possible when I have a subpump myself? Any help is greatly appreciated!

joecaption

Can you see where you drain ends outside?
If so have him dump some water in his pit enough so the pump comes on and see if the water comes out of your end.
Not sure why your drain line is coming from a roof.
A sump is in a basement or crawl space.

Short of that your going to have to dig it up to see where it goes.
Dump red food coloring in your sump add water and see if it shows up in his basement.

MercedesSC2001

My sub pump is in my basement. However, I can see the drain off my roof leading to under my bricked patio. Where it goes from there I have no clue but each townhouse has their own sub pump. Once it becomes day light out I will pour water in my sum pump to see if I see it leading out somewhere. Thanks for the help.

* hopefully I can solve this without having to dig up my patio.

Javiles

Florescent dye test.

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plumberinlaw

lets see if I understand you correctly. The drain on your roof is actually the gutter, the drain on the side of your t/h is the downspout. If the black extender is really a corrugated drain line I am pretty sure it ends somewhere in your yard. to check if it is connected to your neighbors sump stick a hose in your drain and see if his sump fills up or if you can locate where the water comes out in your yard. A plumber with a sewer camera and locator can trace the line and tell you for sure.