Might not be up to code, but when was the building inspector came to your house to check your inside water connections? If it works and does not contaminate any other water in the house, what is the problem. You can bring it up to code when you have other work done that needs inspection, or when you go to sell - or not. Easy way to bring up to code is to just disconnect the splitter and hose from the fridge. Is there any code that says your fridge has to be connected to water?