Hydrojetting or snaking for my sewer line?

Two tools, two jobs

A cable machine spins a steel cable with a cutting head down the pipe. It chews through roots, breaks up a soft blockage, and hooks out objects. It is fast, works in any pipe, and restores flow in an emergency. What it leaves behind is a channel through the problem, with the walls of the pipe still coated in whatever was there.

A hydrojetter pushes water at high pressure through a nozzle that pulls itself along the pipe and blasts backward and sideways. It strips grease, scale, sediment and root fibres off the entire circumference and flushes the debris downstream. It is thorough, and it is how a pipe is prepared for a camera to see the wall properly or for a liner to bond to it. It needs a line that can take the pressure.

When to use which

Situation	Cable	Jet
Active backup, need flow now	Yes — first	After, if the pipe allows
Single root mass at a joint	Yes	Better removal; same regrowth
Grease in a kitchen or restaurant line	Poor — pushes a hole through	Yes
Scaled cast iron under the slab	Knocks off some scale	Yes, with a descaling head
Sediment in a belly	No	Yes — temporarily
Preparing for lining	No	Yes — required
Fragile Orangeburg or thin concrete	Carefully	Reduced pressure or not at all
Unknown pipe condition	Cable, then camera	Not blind

The order that makes sense

Restore flow with a cable if the house is backed up.
Look with a camera. This is the step most often skipped, and it is the one that decides everything after it.
Clean properly with a jet if the pipe can take it and there is something to gain — scale, grease, root fibres — or if lining is next.
Fix the cause: seal the joints, re-grade the belly, replace the section. Or, if the line is sound and it was a one-off, do nothing more.

Why cleaning is not a plan

A line that needs cleaning every year has a defect that is being managed rather than fixed. Sometimes that is a reasonable choice — a shallow line under lawn with roots at one joint might cost less to cut annually than to line, for a while. But it is a choice that should be made with the footage in view, not by default. Each cable pass through a joint widens it; each year of root growth in a concrete crown weakens it; and the cleaning that is routine this winter becomes the emergency in three. Our cleaning page covers both tools and when we reach for each.

Notes for older Seattle houses

Clay: takes jetting well; root-cutting nozzles are effective; lining afterward leaves no joints in the lined section for roots to enter.
Concrete: check the crown before jetting at pressure.
Orangeburg: both tools shorten its life. Cable gently, camera, and plan the replacement.
Cast iron under the slab: jetting with a chain or descaling head is what actually cleans it; a cable only polishes the tubercles.

Questions people also ask

Can hydrojetting damage old pipe?

At full pressure in deteriorated Orangeburg, thin concrete or badly channelled cast iron, yes. That is why the line should be looked at before it is jetted, and why pressure and nozzle choice matter.

Why did the clog come back a month after snaking?

Because the snake opened a channel through the cause rather than removing it. Roots regrow into the same joint; grease re-coats the same rough wall; a belly refills. Cleaning maintains a line; it does not fix one.

Does jetting remove roots?

Root-cutting jet nozzles remove root mass thoroughly, but the roots will return through the same joint unless it is sealed. Jetting is the right preparation for lining; on its own it buys time.

How often should a line be cleaned?

A sound line should not need scheduled cleaning. If yours does, the schedule is a symptom — a camera will show what is causing it.

More of the questions we hear every week are on the FAQ page .

Hydrojetting or snaking: which one does my sewer line actually need?