What type of fitting is typically used with slip fittings?

Slip fittings are specifically designed to be used with pipe that has a smooth exterior surface, allowing for easy insertion of the pipe into the fitting. The term "slip" refers to how the pipe slides into the fitting. A smooth wall fitting is ideal for this purpose as it ensures a snug and secure connection, facilitating efficient water flow without leaks.

In various irrigation systems, using a smooth wall fitting helps in minimizing friction loss and ensures that joint integrity is not compromised. This is particularly important in irrigation design, where effective water delivery is crucial for agricultural efficiency. Additionally, the ease of installation associated with slip fittings makes them a preferred choice for many applications in irrigation.

The other options involve different methods of connecting pipe, which do not provide the same straightforward interface as slip fittings. For instance, threaded fittings require pipes to have exterior threads to create a connection, whereas compression fittings use a different mechanism involving a fitting and a compression ring to secure the connection. Cap fittings, on the other hand, are used to seal the end of a pipe rather than for making connections between pipes.