I discovered a leak in the drain pipe from my kitchen sink (and dishwasher) as it joins with the main drain in my basement floor.
The leak is at a Y junction - the bottom of the Y is in the slab, one branch of the Y is terminated with a cap (I assume access for cleaning / plumbing problems?), and the other branch of the Y goes into the wall (and up to the kitchen). The bottom is in the floor, the top is capped off, and the branch goes into the wall. I don't know the exact angle or diameter.
I can see water bubbling from this 2nd branch (into the wall) when water is draining from the sink. After some cleanup, it look as though the ABS glue has either cracked, and there is no longer a proper seal - or it's been like this for the last 10 years since the house was built.
In any other plumbing fun, I've outright replaced the parts in question (eg, for the sump pump, I cut the pipe going out of the house, replaced it with removable parts, and put in a new pump, etc.). Doing so here is much harder because this part is in concrete.
What are the implications if I clean up the source of the leak really well (clean, sand, etc) and be liberal with some silicone glue? What's the correct way of repairing such an issue?