I'm in Minneapoils, and I'm gutting the master bath. I intended to get a permit. Several years ago I remodeled the kitchen (with permits) and everything went well. I grew up in a home that owned a HVAC wholesaler - so I'm comfortable with soldering / wiring / etc.

I intend to remove some cast iron sewer line - and I'm going to have a plumber friend help me with that.

Are there any kind codes that I should be particularlly aware of? (Besides good workmanship and common sense engineering)