In plumbing, what technique involves using a rod for cleaning pipes?

The technique that involves using a rod for cleaning pipes is rodding. This method typically utilizes a long, flexible rod or a series of rods to physically break apart clogs in pipes or to scrape the inner surfaces of the pipes. Rodding is particularly effective for clearing blockages caused by tree roots, grease, or other stubborn debris that may accumulate over time.

Rodding is often preferred for its direct physical action, allowing workers to address clogs in a way that is efficient and immediate. The use of specialized tools, such as augers attached to rods, can further enhance the effectiveness of this technique, allowing for deeper penetration into the pipes compared to other methods.

In contrast, jetting uses high-pressure water streams, sourcing isn't a recognized technique in this context, and flushing typically refers to using water to clear materials out of a system rather than employing a mechanical rod. These differences highlight why rodding stands out as the appropriate answer for this query.