On May 26, 9:37*am, "Stormin Mormon"
wrote:
I'm not sure about closet elbows.

You're right, that a "streeter" has male and female ends. Long turn means a
more gentle arc. Since it's not slamming the water from one directon to
another, it produces much less resistance to the flow of water. I use long
turn / radius whenever possible.

I don't see long turn elbows explicitly called out in the building
code. I am assuming it is acceptable practice to use for toilet waste
piping?