The 2006 National Standard Plumbing Code comes updated from the 2003 code and contains 18 sections which detail the most common devices, fixtures, materials and equipment that are most widely used during the installation of various plumbing systems. This is the only code that comes with an appendix detailing graywater recycling systems. This 2006 code comes in a three ring binder format and is essential to any contractor, plumber, heating and air conditioning technician or or a homeowner looking into renovation. This handy resource is perfect for a work truck, shop or job site and can easily fit onto a shelf with the rest of your trade manuals.