However, you may be able to install a portion of the rough-in plumbing for a new bathroom, kitchen, or laundry room in an existing home depending on your skill. Rough-in work should be inspected ...

When you're done with the copper water piping, close the laundry valve and open the main water valve to check for leaks. If there are no leaks, you're ready to call for a plumbing rough-in inspection.