How is a Closet Bend different from a regular Street Bend (an elbow with one spigot and a hub)?

Is it due to a longer reach or more gradual bend, or is it something different?

Many references to closet bends seem to be 4" by 3" - is that the key feature?

Thanks

They are a "square" corner so they will fit inside the floor space. Some are 4x4 and others are 4x3, although there are also 3x3 version less commonly used.

Thanks! - So the key thing that makes a Closet Bend different from an Elbow is that it fits in a smaller space? That's clear, and surprises me a bit.

Is it correct that a Closet Bend also typically has one spigot and one hub connection (like a Street Bend Elbow)?

Thanks again

The typical one has spigot/plain ends on both sides. If it is a "hub bend" for mounting further below the floor, it will have a longer radius turn and TWO hubs.

ABS and PVC closet bends have a long riser that can be trimmed for the proper flange location. Cast iron closet bends have long risers and horizontal runs(they available with different lengths) to allow for less fittings needed in a possibly tight spot and are also trimable. The cast iron bend is also available with a hub.




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The idea of two spigots with some extra length for trimming makes perfect sense. I think I'm finally getting the concept. Thanks all!



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Cast iron closet bends have four dimensions in their specifications. outlet size, inlet size, riser length, and outlet length. Within those four dimensions you can usually find a bend that works with little, if any, modifications.

With ABS is it any shorter than a 3" flange and st.90?

closet bends indicate toilet drainage and are to be no smaller than 3 inch dtain lines