What Causes a Slow Drain?

A slow drain is one of the most common plumbing complaints and is usually a sign that a partial blockage is forming inside your pipes. If left untreated, a slow drain can progress to a complete clog or even cause wastewater to back up into your home.

In bathroom sinks and showers, the most common cause is a buildup of hair, soap scum, and skin oils that accumulate along the pipe walls. Over time, this sticky residue narrows the pipe opening and restricts water flow. Kitchen sinks often slow down due to grease, food particles, and starch that solidify inside the drain line.

Mineral deposits from hard water are another common factor, particularly in the Los Angeles area where water hardness levels tend to be elevated. These deposits gradually coat the interior of pipes, reducing their effective diameter.

If multiple drains in your home are slow simultaneously, the issue may be deeper in your plumbing system. A partial blockage in the main sewer line caused by tree root intrusion, pipe deterioration, or accumulated debris can affect every fixture connected to that line.

For isolated slow drains, a plunger or drain snake may clear the obstruction. For recurring or widespread slowness, professional drain cleaning with camera inspection is the most effective solution. Agent Rooter uses advanced hydro-jetting equipment to restore full flow and identify underlying problems before they become emergencies.