It doesn’t help that the Uniform Plumbing Code only recently added traditional wet venting to the code, although the name was changed to horizontal wet venting.
The United Association and the Natural Resources Defense Council have proposed a code change to the 2015 edition of the Uniform Plumbing Code
February 25, 2014
The United Association and the Natural Resources Defense Council have proposed a code change to the 2015 edition of the Uniform Plumbing Code to require insulation of all hot water piping systems such as those serving lavatories, showers, dishwashers and kitchen sinks.