Why Your Drain Keeps Clogging (and How Hydro Jetting Fixes It)

A drain that keeps blocking has a cause that was never removed. Clearing restores flow without changing the pipe, so the same deposit rebuilds at the same rate and you are back where you started on a predictable schedule.

The four causes that recur

Grease lining a kitchen line. Roots at a joint in a lateral. A belly. A sagged section holding standing water and solids. And lost bore, where cast iron has corroded inward or galvanized has closed up. Each recurs, each needs a different answer, and all four look identical from the top of the cleanout.

Why clearing feels like it worked

Because it did, briefly. A cable makes an opening through the deposit and water runs. But a channel through a grease lining is not a clean pipe: the effective diameter is a fraction of the installed one, and it closes again from the same starting point. That is why the interval between blockages tends to shorten each time.

The interval tells you what it is

Weeks in a kitchen line points at grease. Seasonal, particularly after rain, points at roots. Immediately after heavy use, with a gurgle, points at a belly holding water. Steadily shortening intervals across the whole house points at bore loss in the main.

What actually ends it

For grease, jetting the wall back to the pipe and changing what goes down the sink. For roots, sealing the joint they enter through. Lining or replacement, not another cut. For a belly, correcting the section, since nothing else lifts it. For bore loss, replacement of the affected run. None of those is another cleaning.

Get the footage before you decide

A camera answers the question in minutes and nothing else does. It is also what makes a quote comparable: two contractors reading the same footage are quoting the same job, and two quoting from the top of a cleanout are guessing at different ones.

The maintenance option, honestly

Sometimes the right answer is scheduled cleaning rather than repair: an older line, a household planning to move, a run under a driveway nobody wants to open yet. That is a legitimate decision, provided it is a decision and not a default nobody ever examined.

Keep a note of the dates

Write down each blockage and what the household was doing. Three dates and a pattern tell a plumber more than any description: a kitchen line failing every six weeks reads differently from one failing after every large gathering, and both read differently from a whole-house slowdown that arrives with the rain. It is free, and it shortens the diagnosis.