Building codes are usually established by the municipality where the building is located. State laws concerning this issue generally pertain to public structures such as, hospitals, government buildings, and so forth, but can supersede municipal codes in some circumstances. It would be unusual for any town, city, etc. not to require some type of Plumbing codes, with the exception perhaps being private rural property. In Minnesota we have a state code. There is a Uniform plumbing code that is national but many states supercede it with their own code. At least for now.
Actually NYC is still the hardest in the country
Uniform Plumbing Code (UPC) is a model code developed by the International Association of Plumbing and Mechanical Officials (IAPMO) to govern the installation and inspection of plumbing systems as a means of promoting the public's health, safety and welfare.
The Uniform Plumbing Code was developed by by the International Association of Plumbing and Mechanical Officials (IAPMO). IAPMO is a trade organization. The Code was started by a group of Los Angeles area plumbers in 1926.
This is a phrase that refers questions to the local level. For plumbing, the authority having jurisdiction would be the local plumbing inspector. Even though the plumbing code is provincial or state wide, all quibbles and interpretations are to be done by the local inspector.
There are two different plumbing codes in the US. The first is the International Building Code and the other which is the far superior and more stringent is the Uniform Plumbing Code. Due to differences in geography , weather, and climate these codes change bases on what part of the country you are in. From there codes can even change based on what county or even what city you are in. This is often revised and ammended by The Authority Having Jurisdiction and state legislature. Another orginazation that writes plumbing code is the International Association of Plumbing and Mechanical Officials or I.A.P.M.O. The inspector is usually from the city or county in rural area's and usually representing the Plumbing or Building department. there are even some places in the US such as certain locations in Alaska that dont have any regulation or plumbing code.
South Dakota!
They are illegal to use in Minnesota. Because they are prone to leakage they are not allowed by the Minnesota State Plumbing Code.
All plumbing SHALL BE inspected and accepted prior to closing or painting
NO plumbing code would dare say use a globe valve under ground that has no access to service it?
The page in the link below lists the plumbing license exam for every state:
Most people don't hire a plumber more than once every two to three years. Those that own a business that requires plumbing often much seek a plumber much more often, to ensure that their plumbing meets the rules and regulations that the uniform plumbing code has. If you're purchasing a sink, tub, or anything that runs water for your home, make sure it's up to date and follows all the uniform requirements of the uniform plumbing code. If you ever have any doubt about what does and doesn't make the code, then contact a licensed plumber to learn about the uniformed plumbing code.
Plumbing training teaches the basic principles of hydraulic engineering. You will learn about the various parts and tools used in trade, along with some theories about plumbing. Emphasis on code requirements for your particular state or municipality will also be taught. Vocational schools, training centers and online classes all introductory courses in plumbing that allows you to get your feet wet in this growing trade.