re: Calling plumbers of TD

I'm not sure about plumbing code, but a T fitting for dishwasher and ice machine is extremely common for supply lines.

Most double kitchen sinks have a T for the drain line.

DON"T use that flexible pipe crap.

ETA: I'm talking about this. Downvote away, but no real plumber would ever use this and if you pay someone to do a job that uses this you should fire them. There's better methods that are firm smooth pipe. But most importantly the corrugated pipe will trap debris and cause you to get blockages. Blockages happen with smooth pipe, throw in debris traps and what do you think will happen?