So i needed to get a floor drain installed in my garage because it is sloped inward. I thought it would be cheaper to install floor drain rather than resloping the floor out (not to mention the reduced ceiling height this would produce in the back).
The plumber told me something I've never heard before. That new code requires a water line to provide a constant drip in the floor drain so as to keep the water in p trap from sitting too long and evaporating causing the trap to loose its seal. Makes sense, but I've never seen one before.
Firstly, is this accurate?
Secondly, how is it done? What does it look like? I envision a water line running in the ground into the side of the floor drain, and a tiny hole to provide a trickle of water?