I do all my work the same way as the building code. I have worked as a contractor and developer since I was 18 and I am 57. I do every job above the code. I run all the water lines underground the same way the old ones where.
Brulen I am not sure what plumbing code from what state you are talking about since every state has there own codes. For the last 35 years of construction which I have seen every type of construction all plumbers do it the same way I did.
74, underground copper or PVC pipe will not freeze also the pipes on the wall have to be in the walls not on the outside. Yes it is a lot of work but I use a good blade that cuts the concrete. LOL you guys think I put the pipes outside?