Is a hot/cold utility sink in CO garage a bad idea?

[Robb]

I put a utility sink in my garage about 13 years ago, probably one of the best house mods I've ever done and no problems as of yet. And handy as hell, we use it all the time.
I fully insulated and sheetrocked my entire garage, which is probably key. My sink sits against a house wall so there's plenty of heat seeping from the house, it's never frozen and I don't believe anything in my garage has ever frozen and I never unhook the sink - plenty warm enough during the winter. My lines came from the basement, all PEX so it was easy to tie into, drain was easy also.