Credits WEc1 WEc3 WEc3 WEc1 WEc3 WEc3 WEc3 WEc1 WEc3 WEc3 WEc3 WEc1 WEc3 WEc3.1-3.2 This is a referenced standard for this credit. Resource type Technical Guides Link http://www.amazon.com/2006-International-Plumbing-Code-Softcover/dp/1580012590
