I live on the third floor of a condo in Florida. I found that I have a leak at the kitchen drain. There is apin hole sized leak under the sink but there is another leak behind the plastered wall behind the cabinets. The leak is going out into the cement that supports the common porch and I'm afraid that it could rust out the rebar in the cement. Is this my responsibility or the associations? I would appreciate any help you can give me. Thanks

If the leak is within boundaries of your condo than I would assume it is your responsibility to fix it. Additionally, if you don't fix it and leave it intentionally to leak you could be liable for damage it caused.

Now, if there is a leak inside a common wall than I would call HOA and report it. You have nothing to loose. In my HOA, HOA is responsible for leaks in common areas, including "party" walls.

Now, I am talking from my own experience owning condo in So.California. Read your CC&R's . Each HOA draws its own rules and regulations. It may be different in FL.

I live on the third floor of a condo in Florida. I found that I have a leak at the kitchen drain. There is apin hole sized leak under the sink but there is another leak behind the plastered wall behind the cabinets. The leak is going out into the cement that supports the common porch and I'm afraid that it could rust out the rebar in the cement. Is this my responsibility or the associations? I would appreciate any help you can give me. Thanks

I've spent years building Florida Condos. You describe a problem that remains within the confines of your unit. Milo was bang on when hbe advised that it was your responsibility to have it repaired. The leak under the sink will be easy to get at and repair. The leak inside the wall, (it is a drainage leak and not a pressure leak isn't it?) will be a different story. You have cabinets on one side and a cement block wall on the other.
When this happened to me I opted to take a section of the block wall out and replace the line instead of tearing out the sink and cabinets. Less muss and fuss. After I replaced the line I patched the wall and repainted it and saved myself a whole bunch of hassle. Good luck, Tom