DWV elbow types???

[millinghill]

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
3. 90deg Closet Elbow
4. 90deg Long Turn Elbow
5. 90deg Long Turn Street Elbow

I saw these variations on a manufacturer's catalog

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.

[marson]

and am curious to learn more

Yes, street has one male and one female side. l Long turn are used for drain portion for good flow and ease of snaking. Closet elbows are for toilets.

[Stormin Mormon]

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.

[millinghill]

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?

[Wayne Whitney]

Others have answered about the meaning of "Street" here. As for long turn 90s, they are required by the plumbing code (UPC) for drains whenever the outlet of a 90 is horizontal. So if you use a 90 to take a drain from vertical to horiztontal, or from horizontal to horizontal, you need a long turn 90. To take a drain from horizontal to vertical, you can use a regular 90 (not a vent 90). Of course "horizontal" here really means sloped at 2% or more to provide drainage.

Cheers, Wayne

[Stormin Mormon]

I've never read the plumbing code, but common sense says that long radius is less resistance to the flow of fluids. Or solids.