April 13, 2026

You’ve cleared the blockage before. You plunged it, maybe poured something down it, and the water started moving again. Job done, or so you thought. A few weeks later, the same drain is slow again. The same gurgling, the same smell, the same frustration. This is one of the most common drainage problems people face, and it usually comes down to one thing: the blockage was shifted, but never properly removed. That’s exactly where drain jetting comes in. It’s not just a way to deal with blocked drains, it’s a way to clear them completely, right back to the pipe wall, so the problem doesn’t keep coming back. In this guide, we’ll explain what drain jetting actually involves, why it’s so much more effective than most other methods, and when it makes sense to use it. Whether you’re dealing with a stubborn blockage right now or you want to stay ahead of problems before they start, this is worth reading. What Is Drain Jetting? Drain jetting, sometimes called high-pressure water jetting or hydro jetting, is a method of clearing drainage pipes using a powerful, focused jet of water. A specialist hose is fed into the drain, and water is pumped through it at very high pressure. That jet of water blasts through blockages, scours the inside of the pipe, and flushes everything out, grease, scale, roots, silt, debris, leaving the pipe clean rather than just passable. The pressure used is significantly higher than anything you’d get from a garden hose or a standard pump. Professional drain jetting equipment typically operates at pressures ranging from 1,500 to 4,000 PSI depending on the pipe size and the severity of the blockage. The nozzle at the end of the hose is specially designed to direct water forwards to cut through the blockage and backwards to propel the hose through the pipe and flush material away behind it. It’s a thorough process, and that’s what sets it apart from plunging or using chemical products. Those methods can move a blockage. Drain jetting removes it. Why Drain Jetting Works Better Than Other Methods Most people reach for a plunger first, which makes complete sense. For minor blockages, a bit of toilet paper, a small build-up near the drain opening, a plunger does the job. But for anything more serious, plunging is a short-term fix at best. Here’s the problem. Most blockages don’t form at the very surface of the drain. They build up over time, further down the pipe, as grease clings to the walls, debris accumulates, and scale or mineral deposits narrow the pipe gradually. A plunger creates suction but it can’t reach deep enough to address where the real problem is. You might clear enough to get water moving again, but the residue that caused the blockage is still there. Chemical drain cleaners have a similar limitation. They can dissolve some organic material, but they struggle with grease that’s solidified against the pipe wall, physical debris, root intrusion, or mineral scale. They also introduce harsh substances into your drainage system, which isn’t ideal on a regular basis. Blocked drains jetting treats the whole pipe, not just the section you can see or reach. The high-pressure water doesn’t just punch a hole through the blockage, it strips the build-up from the pipe walls entirely, leaving the internal diameter of the pipe fully clear. That’s why blockages are far less likely to return quickly after a jetting service compared to other clearing methods. What Drain Jetting Is Used For Drain jetting isn’t a one-trick solution. It’s used across a wide range of drainage problems, and it works on both domestic and commercial properties. Clearing stubborn blockages, When a drain is completely blocked and won’t respond to plunging or chemicals, jetting is often the most effective next step. It can break through compacted build-ups, solidified grease, and debris that nothing else will shift. Removing grease and fat accumulation, This is particularly common in kitchen drains. Over time, fat and grease that go down the sink cool and solidify in the pipe, gradually building up into a solid mass. Jetting cuts straight through it and clears it out. Root intrusion, Tree and shrub roots are drawn to the moisture in drainage pipes, and they can work their way in through joints and cracks. Jetting can cut through fine root growth and clear the pipe, though it’s worth noting that if roots are present, a CCTV survey is a smart follow-up to check on the pipe’s overall condition. Routine maintenance, You don’t have to wait for a blockage to benefit from drain jetting. Regular jetting of drains that are prone to build-up, commercial kitchens, older properties, drains near mature trees, keeps them flowing freely and prevents serious blockages from developing. Pre- and post-survey cleaning, When a CCTV drain survey is being carried out, jetting is sometimes done beforehand to clear the pipe enough for the camera to get a good view. It can also be done after repairs to clean out debris left by the work. How the Process Works If you’ve never had a drain jetting service done before, here’s what to expect. A drainage engineer arrives and assesses your drains, usually starting with the nearest access point, such as a manhole or inspection chamber. Before jetting begins, they’ll often take a quick look at what they’re dealing with, either visually or with a camera, so they can choose the right nozzle and pressure setting for the job. The jetting hose is fed into the drain and the pump is activated. The nozzle propels itself through the pipe using rear-facing jets while the forward-facing jet breaks up whatever is in the way. As the hose is gradually withdrawn, it flushes everything out behind it. After the jetting is done, the engineer will typically check that the drain is flowing freely and confirm the blockage has fully cleared. In some cases, particularly where there’s been a recurring problem or where root ingress was found, a CCTV inspection