# Supported Pipe Fittings

Plumbing Copilot supports specific types of fittings that can be included in the generated route. The following four types of fittings are supported:

1. **Elbow**\
   Used to change the direction of the pipe.&#x20;
2. **Junction**\
   Allows the connection of three or more pipes, enabling the creation of branch routes in the system.
3. **Transition**\
   Used to change the size of the pipe, allowing for smooth transitions between different pipe diameters.
4. **P-trap**\
   A fitting designed to trap noxious sewer gases inside the wastewater system so that they can't rise back up through the drain.

These are the **only** fitting types that Plumbing Copilot can include in the generated route. They are essential in defining the routing process. If any of these fittings (except for the P-trap) is missing, the routing process cannot start.
