Hydro jetting clears a drain or sewer line by feeding a hose with a high-pressure nozzle through the pipe. The water jets cut through the blockage and scour grease, scale and roots off the pipe walls. It is the right tool for grease-choked kitchen lines, root-invaded sewer lines and main lines that keep clogging. It is the wrong tool for pipes that are cracked, broken or collapsed, which is why a camera inspection usually comes first.
A hydro jetting machine is a high-pressure water pump connected to a long, flexible hose with a nozzle on the end. The nozzle has a jet facing forward to cut into the blockage and several jets facing backward. The backward jets pull the hose along the pipe and scrub the walls as they go. Everything they knock loose gets flushed down the line and out to the public sewer.
Residential jetting usually runs somewhere between about 1,500 and 4,000 psi. The plumber matches the pressure, flow and nozzle to the pipe's size, material and condition, and uses special nozzles to cut roots.
A snake, or cable machine, spins a steel cable with a cutting head through the pipe. It is quick and cheaper, and for a one-off clog it is often all you need. But it mostly opens a path through the blockage. Whatever is coating the pipe walls stays behind, so the next clog starts forming right away.
| Snaking (cable machine) | Hydro jetting | |
|---|---|---|
| What it does | Bores or cuts a path through the blockage | Cuts the blockage and scours the pipe walls |
| Best for | One-off clogs, single fixture drains, solid objects | Grease, sludge, soft scale, roots, recurring main-line clogs |
| Buildup on pipe walls | Mostly left behind | Mostly removed |
| Tree roots | Cuts them, often leaving pieces behind | Cuts them and flushes them out |
| Pipe condition needed | Works in most lines | Needs a structurally sound pipe |
| Typical cost | Lower | Higher |
Neither method stops roots from growing back where they got in. Only repairing that section does.
Kitchen lines slowly build up a layer of grease, soap and food waste. A snake opens a hole in it. Jetting removes the layer, which is why it works for kitchen drains that clog again a few weeks after snaking.
Jetting removes soft scale and sludge well. Heavy, hard scale in old cast iron pipe sometimes needs mechanical descaling tools instead, or signals a pipe near the end of its life.
Sacramento calls itself the City of Trees, and many older neighborhoods have mature trees growing close to the sewer lines. Older sewer lines are often made of clay or cast iron sections joined together, and fine roots can get in at those joints, then grow into a mat that catches everything flowing past. A root-cutting nozzle clears the pipe and flushes the roots out. Because the entry point is still there, rooted lines usually need either regular maintenance cleaning or a lasting sewer line repair.
If your main line has been snaked more than once and keeps backing up, snaking has only been treating the symptom. Jetting the full length of the line, followed by a camera inspection, shows whether the cause was buildup you can clean out or damage that needs repair. We explain the usual causes in why your house keeps getting drain clogs.
Hydro jetting is not the answer for every clog:
- Collapsed, badly cracked or offset pipe. High-pressure water can wash out the soil around a break and make it worse, and the line needs repair anyway.
- Badly deteriorated old pipe. Cast iron that has rusted thin, or clay with large cracks, may not survive high pressure.
- A sag (belly) in the line. Jetting will clear it, but it can't fix the dip, and debris will settle there again.
- A solid object in the line. Something lodged in the pipe is usually better cut up or pulled out with a cable machine or retrieval tool.
- A simple clog in one fixture. A hair clog in a bathroom sink doesn't need jetting.
Running a camera through the line before jetting shows what the pipe is made of, what condition it is in, and what is causing the problem. It tells the plumber whether jetting is safe, what pressure and nozzle to use, and whether the real fix is cleaning or repair. Running the camera again afterwards confirms that the line is clear. You should be able to see the footage yourself. Our guide to camera inspections covers what they can find.
- Access. The plumber finds your sewer cleanout, usually a capped pipe outside near the foundation. If there isn't one, access may mean pulling a toilet or going through the roof vent, and you may be advised to add a cleanout.
- Camera inspection to check the pipe's condition and find the problem.
- Setup. The machine stays outside and the hose goes in through the cleanout. Water comes from the machine's tank or your outdoor faucet. The machine is loud while it runs.
- Jetting. The plumber makes several passes along the line, often changing nozzles for grease or roots.
- Camera again to confirm the line is clear and to spot any damage the blockage was hiding.
- Findings. You should get a plain explanation of what caused the problem and whether the line needs maintenance or repair.
To prepare, clear a path to the cleanout, keep pets inside, and avoid running water in the house while the work is going on. Many residential jobs take a couple of hours from start to finish. Heavy roots or difficult access take longer.
Most national cost guides put a standard residential sewer line jetting at roughly $350 to $600. Long lines, heavy root growth or difficult access can push it to $1,000 or more. Jetting a single branch drain, such as a kitchen line, is usually less. Quotes in California metro areas often land toward the upper end of these ranges.
These factors change the price:
- Access. An accessible outdoor cleanout keeps the cost down. If you don't have one, installing it is a separate job that cost guides put at roughly $800 to $3,500, depending on depth, distance and permits.
- Length and severity. A long line or a line full of roots takes more time.
- Camera inspection. Typically $250 to $500 on its own when there is cleanout access. Some contractors include it with the jetting.
- Timing. After-hours and emergency calls cost more.
Local quotes vary, so ask for a written price that says whether the camera inspection is included. Our drain cleaning cost guide compares jetting with other methods.
If your main line keeps backing up or your kitchen drain won't stay clear, our drain cleaning team can inspect the line and tell you whether jetting is the right fix. Contact Beaver Brothers Plumbing to schedule a visit.
Can hydro jetting damage pipes?
It can if the pipe is already broken, collapsed or badly deteriorated, which is why a camera inspection should come first. In a sound pipe, at the right pressure, jetting is safe for PVC, ABS, cast iron and clay lines.
Is hydro jetting better than snaking?
For grease, buildup, roots and recurring main-line clogs, yes, because it cleans the whole pipe instead of just opening a path. For a one-off clog in a single drain, snaking is usually faster, cheaper and all you need.
How long do hydro jetting results last?
It depends on the cause. A line cleared of grease can stay clear for a long time if grease stays out of the drain. Roots grow back from wherever they got in, so a rooted line will need cleaning again or a repair at that spot.
How often should a sewer line be hydro jetted?
Most homes never need it on a schedule. If your line has a known issue, such as roots or heavy grease, base the timing on what the camera shows and how quickly the problem has returned before.
