Another useful pipe editing technique is the ability to slide a branch and all its connected components along the main run of pipe to which it is connected. This is particularly useful when it is necessary to make room for other components, so that you can increase the amount of pipe available to place additional components.
The implied fittings at each end of the pipe act as natural barriers, preventing movement beyond that point. In fact, even if no components exist, just an open end of pipe, the software does not allow you to move the branch beyond the endpoint of the pipe.
Click the tee that connects the branch to the main pipe run.
Press the ALT key, and drag the mouse along the pipe run in the appropriate direction.
When the branch is repositioned, release the ALT key.