JP those pipes at bad ass yes they are used in construction nowa days more on residential houses because its easier and more durable
but there are some people that still are a bit on the coo coo side that still mixes them up with cold and hot :P example my aunts house they used the red for cold and blue for hot...long story short my aunt burnt my little cousins toes
but oh well they had to fix that problem and have done so....cough cough nothing to do with nanas but just thought u should know that people will mess up sometimes even when they are color coded :P ohhh also the washer water was mixed up with the cold and hot :P