Your kitchen sink drains slowly. There’s a bad smell coming from somewhere. The toilet gurgles when you run the bath. Sound familiar?
These are signs of a blockage building up in your drains. And while a plunger might shift a minor clog, stubborn blockages need something stronger. That’s where drain jetting comes in.
Drain jetting is one of the most effective ways to clear blocked drains and restore proper flow. In this guide, we’ll explain exactly what it is, how it works, and when you might need it.
What is drain jetting?
Drain jetting (also called high-pressure water jetting) is a method of cleaning drains using powerful jets of water. A specialist machine pumps water through a flexible hose at very high pressure, blasting away blockages and debris from inside your pipes.
Think of it like a pressure washer for the inside of your drains. The force of the water breaks up whatever is causing the blockage and flushes it away, leaving your pipes clean and clear.
It’s different from traditional drain rods, which physically push through a blockage. Jetting clears the entire pipe wall, not just a hole through the middle. This means less chance of the blockage reforming quickly.
How does drain jetting work?
The process starts with a drainage engineer feeding a flexible hose into the blocked drain. This hose is connected to a jetting unit, which is essentially a powerful pump mounted on a van or trailer.
The machine forces water through the hose at pressures between 3,000 and 8,000 PSI. For comparison, a typical garden hose runs at about 40-60 PSI. So we’re talking about serious force here.
At the end of the hose is a specialised nozzle. Different nozzles do different jobs. Some fire water backwards to pull the hose through the pipe while cleaning the walls. Others have forward-facing jets to punch through solid blockages. Engineers choose the right nozzle based on your pipe size and the type of blockage.
The high-pressure water scours the inside of the pipe, dislodging grease, scale, debris, and even tree roots. Everything gets flushed downstream and out of your system.
Before jetting, we often run a CCTV drain survey first. This shows us exactly what’s causing the problem and where it is. It also helps us check that your pipes are in good enough condition for jetting.
What can drain jetting clear?
High-pressure jetting handles most common blockages. Here’s what it can shift:
- Grease and fat build up over time in kitchen drains. You might be careful about what goes down the sink, but small amounts add up. Hot water and washing-up liquid won’t shift a serious fat blockage. Jetting will.
- Hair and soap scum accumulate in bathroom drains. Hair tangles together, soap residue sticks to it, and before long you’ve got a solid mass blocking the pipe.
- Food waste from kitchen sinks, even with a waste disposal unit, can build up in the pipes further down the line.
- Limescale and mineral deposits narrow the inside of pipes over time, especially in hard water areas. Jetting strips this away and restores the full diameter.
- Tree roots that have grown into cracked pipes can be cut through with specialist root-cutting nozzles. Though if roots are a recurring problem, you might need drain repairs as well.
- Silt and debris that washes into external drains and gullies. After heavy rain, outdoor drains can fill with mud, leaves, and grit.
What jetting won’t fix is structural damage. If a pipe has collapsed or is badly cracked, you’ll need repairs or replacement. That’s another reason why a CCTV survey before jetting is useful.
Benefits of drain jetting
Why choose jetting over other methods? Several reasons.
It’s thorough
Drain rods punch a hole through a blockage. Jetting cleans the entire pipe wall. That means less residue left behind to cause another blockage next month.
It’s fast
Most domestic jetting jobs take under an hour. Commercial or heavily blocked drains might take longer, but it’s still quicker than repeated attempts with rods or chemicals.
It’s environmentally friendly
Jetting uses only water. No harsh chemicals going into the drainage system or back into the environment. This matters for commercial properties that need to meet environmental regulations, and for anyone who’d rather not pour caustic substances down their drains.
It’s non-invasive.
No digging, no excavation, no damage to your property. The hose goes in through an existing access point, does its job, and comes out again.
It works on tough blockages.
Chemical drain cleaners might shift minor clogs. They won’t touch a solid fat blockage or tree roots. Jetting handles both.
Is drain jetting safe for pipes?
Yes, when done properly by trained engineers with the right equipment.
Modern drain jetting is safe for most pipe materials including PVC, clay, cast iron, and concrete. The pressure is adjusted based on the pipe type and condition. A fragile old clay pipe gets gentler treatment than a robust modern plastic one.
That said, jetting isn’t suitable for pipes that are already damaged. If a pipe is cracked, collapsed, or severely corroded, high-pressure water could make things worse. This is why we recommend a CCTV inspection before jetting, especially on older properties. It lets us see what we’re dealing with and choose the right approach.
Amateur attempts at jetting with hired equipment can cause damage. Professional drainage engineers know how to adjust pressure, select nozzles, and handle the equipment safely. It’s not a DIY job.
Signs you need drain jetting
How do you know when it’s time to call in the jetting equipment? Look out for these warning signs:
Slow draining
If water takes longer than usual to drain from sinks, baths, or showers, something is restricting the flow. It might be a partial blockage that’s getting worse.
Bad smells
Foul odours from drains usually mean something is stuck and decomposing in there. Not pleasant, and a sign that clearing is needed.
Gurgling sounds
When you hear gurgling from one drain while using another (running the kitchen tap makes the toilet gurgle, for example), air is being pushed through a partial blockage.
Recurring blockages
If you’ve had the same drain cleared multiple times and it keeps blocking, there’s probably a buildup that rods aren’t fully removing. Jetting clears the pipe properly so blockages don’t keep coming back.
Multiple blocked drains
If several drains block at once, the problem is likely further down the system, possibly in the main sewer line. Jetting can clear blockages that affect the whole property.
Don’t wait until a partial blockage becomes a complete one. A slow drain is easier and cheaper to fix than a flooded kitchen. If you’re seeing warning signs, it’s worth getting it checked. We offer a free, no-obligation survey to diagnose the problem before any work starts.
How often should drains be jetted?
For most homes, reactive jetting when problems arise is fine. But if you’ve had recurring blockages, or you know your drains are prone to buildup, preventive jetting every 12 to 18 months can save trouble later.
Commercial properties are different. Restaurants, takeaways, and food production facilities generate a lot of grease. Regular planned drain maintenance, including jetting, prevents the kind of blockage that shuts down a kitchen at the worst possible moment. Some businesses have their drains jetted quarterly.
Properties with known tree root problems might need annual jetting to keep roots under control, alongside longer-term solutions like root cutting or pipe relining.
We can advise on the right schedule for your situation. Sometimes a one-off clear is all you need. Sometimes regular maintenance makes more sense.
Why use a professional drain jetting service?
You can hire jetting equipment, but there are good reasons to call in professionals.
Proper diagnosis
Jetting the wrong pipe, or jetting when the real problem is structural damage, wastes money and might make things worse. Professional engineers diagnose first, jet second.
Right equipment for the job
Professional units are more powerful than hire machines. We carry multiple nozzle types for different situations. And our vans are fully stocked, so if we find something unexpected, we can usually deal with it on the spot.
Safety
High-pressure water is dangerous in untrained hands. Our engineers are fully trained and insured. If something goes wrong, you’re covered.
Speed
We do this every day. A job that might take you hours to figure out, we can often complete in under an hour.
Guaranteed results
If we can’t clear it, you don’t pay. And if there’s an underlying problem we discover during the work, we’ll explain your options clearly with no obligation.
Need drain jetting? We can help
Clark Drainage provides professional drain jetting services across the UK. Our engineers are fully qualified, our equipment is top-spec, and we’re available 24/7 for emergencies.
Every job starts with a free survey and quote. No hidden fees, no obligation. We’ll tell you exactly what’s wrong and what it will cost to fix before any work begins.
Blocked drain causing problems? Get in touch or call us now for fast, professional help.
