Dear Readers,
Can anyone explain (or forward a faq) where I can find out more about
the intended use of the following type of elbow fittings:

1. 90deg Street Elbow
2. 90deg Street Closet Elbow
2. 90deg Closet Elbow
3. 90deg Long Turn Elbow
4. 90deg Long Turn Street Elbow

I saw these variations on a manufacturer's catalog (http://
www.nibco.com/assets/plasticfit.pdf) and am curious to learn more
about them all. Specifically, is the term "street" when the fitting
is male/female? Is there a special use for a "long turn" elbow?

Thanks,
-Theodore.