If I had to guess, I'd say the line going to the tankless water heater with the copper water hammer arrestor is the cold water line.I’m installing an rodi under a sink for someone in an office building. Under the sink it isn’t basic. I’ll attach a video and pictures if someone can tell me which part is the cold water valve so I can connect the adapter for rodi to it that would be super helpful. I plan on running the waste water straight into the sink drains above and not drilling into the pipe. Thanks!
Ok I was thinking the same thing. I guess I could ask someone from the building. Trying to figure out where I connect the adapter down there. Assuming where you circled in the second picture.If I had to guess, I'd say the line going to the tankless water heater with the copper water hammer arrestor is the cold water line.
I think this is the same braided line on the other side.
Again, just guessing. :)
