Previous and Next Pipes

The commands in Design Master Plumbing sometimes refer to next and previous pipes. This section describes how to identify those pipes in your system.

These terms are used when discussing pipes that are connected to a specific pipe you have selected.

The Previous Pipe is the pipe that runs toward the equipment from the reference pipe. It is typically larger than the reference pipe. For supply pipes, previous pipes are upstream from the reference pipe. For return pipes, previous pipes are downstream from the reference pipe. Pipes only have a single previous pipe.

Next Pipes refer to the pipes that run toward the fixture from the reference pipe. They are typically smaller than the reference pipe. For supply pipes, next pipes are downstream from the reference pipe. For return pipes, next pipes are upstream from the reference pipe. Pipes can have multiple next pipes.