Used when an offset is required to avoid obstructions such as rafters, joists and other construction obstacles

Used to orient pipe between vertical and horizontal orientation

Four piece adjustable elbow twists for easy offsets

Size refers to the inside diameter of the pipe or fitting

The outside diameter of RV is approximately 1/2" larger

3" elbow - 3 gore; 4", 5", and 6" elbow - 4 gore

Type B gas vent