I heard dripping in my furnace room and found this thin plastic tubing coming from under the overhead insulation.
It is dripping slowly but steadily, and appears to be clean water, I.E. No smell or discoloration.
Thoughts, Before I go tearing it apart?
Best Answer
It looks to be a saddle valve which is used often because it means that you can add a tap for a fridge's ice maker to an existing water line without cutting into them. However they can start to leak and they don't get a perfect seal into the pipe when turned off either.
If you find it leaking you should be able to replace it with a proper tee and valve to fix the leak.