You may want to go with a 1/2" supply for this one.
I have a single cold water valve coming into a bar sink, and I want to add a tankless water heater. I see they make a 'double stop' valve that is essentially a dual outlet valve. Is this code compliant if I use this to split my cold line??
The heater I had picked out actually uses 1/2" NPT...I was just wondering if it was cool to use one of those valves they put on for dishwashers...to split the cold line. Is that legit?
Yes, if Iunderstand you correctly, it's OK to do.