Hydro jetting in Los Angeles for grease, scale and roots that keep coming back

A drain cable is a rotating steel spring with a cutter on the end. It is excellent for breaking through a blockage, but it only touches part of the pipe wall as it turns. In a four-inch line coated with grease, it might leave a two-inch opening that closes again as new grease sticks to what's left.

A jetter works differently. Water at high pressure leaves a nozzle through several small openings. The rear-facing jets drive the hose forward and spray the full circumference of the pipe, and the forward jet breaks up anything ahead. Grease, soap scum, mineral scale and sludge come off the walls and wash down to the sewer main.

We choose the nozzle for the job: a penetrating nozzle for a hard blockage, a spinning nozzle for grease, and a root-cutting nozzle when fine roots remain after cabling. Pressure and flow are set for the pipe size and material, which matters a great deal on older lines.

Jetting is powerful, and that is exactly why we don't run it blind. Old clay with cracked or offset joints, cast iron rusted thin, or a lateral that has partly collapsed can be made worse by high pressure, and water can push out of a broken section into the soil. A short camera inspection before jetting shows the pipe's condition and where any trouble spots sit.

If the pipe is sound, we jet with confidence and run the camera again afterward so you can see the clean wall. If the pipe is broken, jetting is not the right step, and we talk about repairing the damaged section instead. Either way you see the footage and the decision is yours.

• Before: confirms material, condition and any breaks or bellies
• During: helps place the nozzle at problem joints
• After: shows the cleaned pipe wall on screen
• Recording: yours to keep for future reference or a home sale

Kitchen lines are where jetting earns its cost. In a house, a heavy cook or a busy disposal can coat the kitchen branch within a few years. In a fourplex or a larger building in Koreatown or Mid-City, several kitchens share one stack, and the bottom of that stack can close down to a small fraction of its original size.

For restaurants and food service, jetting the line from the grease interceptor to the sewer is routine maintenance, and it pairs with grease trap pumping and cleaning. Clearing the line without dealing with the trap, or the reverse, leaves half the problem in place.

For apartment buildings, we often recommend jetting main kitchen stacks on a schedule. It costs less than repeat emergency calls and keeps lower-floor tenants from having water come up through their sinks.

Cast iron develops tubercles, hard rust-and-scale bumps inside the pipe that catch debris. A jetter with the right nozzle removes the softer layers, and a chain or descaling tool can do more on badly scaled pipe. But jetting cannot rebuild metal that's already gone. If the camera shows deep pitting or holes, cleaning reveals the damage rather than fixing it.

The same is true for roots. Jetting clears fine roots and the sludge they hold, but a mature root mass needs a cutter first, and roots return to joints that leak water. Jetting is a strong maintenance tool, not a pipe repair. We will be clear about which one your line needs.