Drain jetting uses high-pressure water to clear a blocked pipe. It is also called hydro-jetting. Since it cleans the pipe wall too, for most blockages it is faster and more thorough than rodding, and it leaves the pipe in better shape than chemicals do.

This guide explains how jetting works and what it clears. It also shows when it beats other methods, because the right choice saves money. For the wider picture of methods, see our guide to clearing blocked drains.

How High-Pressure Jetting Works

A jetting unit has a pump, a water supply and a flexible hose. The hose carries a special nozzle. While the unit sits on the van, the pump sends water through the hose at high pressure, and the nozzle turns that pressure into jets.

Most nozzles have two sets of jets, because each set does a different job. Forward jets break up the blockage and drive the nozzle along. Rear jets point back along the pipe, so they scour the walls as the hose comes out.

This two-way action sets jetting apart from rodding. The engineer clears the plug and cleans the pipe in one visit. Nozzles vary, because soft build-up needs a different head from hard grease or scale.

The engineer also adjusts the pressure to the pipe. Old clay pipes are fragile, while modern plastic pipes are tougher. For this reason a camera check helps before jetting an old system, as our guide on what a drain specialist does explains.

What Jetting Clears Best

Jetting suits most blocked drains, although some jobs need other tools. Here are the main cases:

Grease and fat. Kitchen drains collect fat that cools and sets on the pipe wall. Over months it narrows the bore, because each meal adds a thin layer. Jetting breaks it up and flushes it away, whereas chemicals often treat only the surface.

Silt and debris outside. Gullies and chambers fill with silt, leaves and grit. Jetting flushes the material through and out, instead of pushing it along the pipe. This matters because loose silt otherwise settles again further on.

Hair and soap scum. Bath, shower and basin pipes clog with hair and soap. Jetting clears the trap and the pipe beyond it, while the rear jets wash soap from the walls.

Scale. Older pipes in hard-water areas gather mineral scale. Scale narrows the pipe and catches debris, so repeat jetting can help. Progress may be slow, because heavy scale builds up over many years.

Loose roots. After roots are cut, jetting flushes out the pieces. Roots matter because they return unless the crack is sealed. To understand why, read what causes a drain blockage.

Why Jetting Beats Rodding

Rods are best for a clear object in an easy spot. For build-up, however, a rod punches a hole and leaves the residue behind. That residue catches new debris, so the drain can block again soon.

Jetting removes the blockage and much of what caused it. As a result, a jetted pipe tends to stay clear longer. For repeat kitchen blockages, a jet plus a care routine is usually better value than repeat rodding. See why drain maintenance matters and why drain cleaning is important.

What Happens During a Visit

The engineer finds the nearest access point, such as a manhole or inspection chamber. They feed in the hose and start the pump. While the unit runs, most of the noise stays outside at the access point, so the work causes little fuss indoors.

After clearing, the engineer runs water through the system to check the flow. While simple jobs end there, on more complex jobs, a camera confirms the pipe is clear. For a closer look at the visit, see our drain unblocker service page.

Keeping Drains Clear Afterwards

Jetting is not a one-off cure for every pipe. Good habits matter too, because debris returns if the cause stays. Regular care helps as well. Read how to keep your plumbing efficient and why to invest in a drain cleaning service.

If a blockage is urgent, see emergency drainage in London. Waiting can make the mess worse, since a full pipe has nowhere to send the water.

Where We Work

While every job differs, we use jetting for drain clearance and blocked drains in Enfield drain unblocking areas, plus blocked drains in Barnet and drain help in Edgware. To book, use the online enquiry form. We offer same-day help for urgent jobs.