The attached picture is of a 3/8 inch water line that is connected to the cold water line under the sink in a bathroom. The bathroom is a full handicap bathroom with a shower designed to roll your wheelchair in, and a 2nd drain in the middle of the tiled floor for the occupant to drip into after the shower. This is the trap for the floor drain.
I wrote this up as a health safety hit because I don’t think you can connect potable directly to the drain like this. I got a call from the person who remodeled the bathroom saying that is was required for code for a drain that doesn’t have a fixture on it to allow you to put water in the trap. I told her I needed to do some homework.
Can you guys help me out? I am not finding it in the residential code. Mayby the plumbing code? I don’t have that one. This is a single family home. At a minimum I would think it would need some type of vacuum breaker or air gap type connection. I didn’t see it, but I am told it has a checkvalve.
Appreciate your input.