I applied for a permit and the plumbing official stated “Riser diagram must be in accordance to N.S.P.C. 2006″. I have done many plumbing permits with a riser diagram and have read the code but cannot find a riser diagram according to above code.
Is there a website illustrating this riser diagram or any other help is appreciated.
They should be able to show you typical illustrations or be able to tell you where you can find that in a code book, in the reference section of your local library. Are you a licensed plumber
Another thing you can do is what architects and engineers do when they submit plans around the country and that is back vent every fixture with the correct size vent pipe, this design will pass every code that applies in the USA that I know of.
