What is drain jetting? It’s the high-pressure water method that engineers use to blast through blockages and clean the inside of your pipes, typically at 1,500-4,000 PSI, depending on what you’re dealing with. Let’s delve into the topic in detail to understand how drain jetting works and how it helps homeowners!
You’ve tried the plunger, poured something caustic down the sink that promised miracles on the label, or even used a coat hanger, which, for the record, almost never works and sometimes makes things worse. Three days later, water’s pooling around your feet in the shower again.
At Plumbers 365, we often have this exact conversation with our customers more than we can count. It’s rarely a one-off problem, and there’s usually a reason it keeps happening. Thankfully, our drain engineers perform drain jetting to ensure everything works seamlessly again!
Delve into the blog to understand exactly how drain jetting works!
Most DIY methods share one flaw. They punch a narrow channel straight through the middle of a blockage and stop there. Water flows again, briefly, but the pipe walls are still coated in grease and scale, which is exactly where the next blockage will grow.
But, jetting works differently. A machine pumps water through a reinforced hose at high pressure, and the nozzle on the end fires jets in two directions at once, backwards and forward.
The backward jets drag the hose deeper into the pipe on its own, almost self-propelled, while the forward jets do the actual scrubbing on the way back out.
A few things worth knowing:
An engineer turns up with a jetting unit, usually van-mounted, plus a coiled hose and a set of interchangeable nozzles for different jobs. They find an access point, a manhole or inspection chamber, and feed the hose in.
The backward jets pull it forward through the drain. Once it’s reached the trouble spot, the engineer draws it back out slowly, and that’s when the real cleaning happens. Debris, grease, whatever’s built up over the years, all gets flushed toward the main line.
When required, we also do a CCTV survey, either before to work out what’s actually going on, or after to prove the pipe’s genuinely clear rather than just quiet for a fortnight.
This part is often skipped in most guides, which is a shame because it explains why blocked drains are such a persistent headache across the UK.
Water UK puts the figure at over 300,000 sewer blockages a year nationally, and roughly 80% of those stem from something being flushed or poured down that shouldn’t have been.
Southern Water estimates fat, oil and grease blockages alone cost around £90 million a year to clear, and their own data suggests more than 60% of that was avoidable.
Thames Water, the biggest water company in the country, clears about 75,000 blockages annually at a cost of roughly £18 million, a lot of it tied to wet wipes binding with grease into what the industry calls fatbergs.
There’s also research from UK Water Industry Research linking wet wipes to nearly half of all UK sewer blockages, which is part of why plastic-containing wipes are being phased out by law come May 2027.
Blocked drains aren’t bad luck; they’re a fairly predictable, largely preventable, and genuinely expensive problem, and that’s why jetting exists as a proper fix rather than a temporary patch.
Not every gurgling sink needs the industrial treatment. But a few signs usually mean it’s time to call the drain engineer.
Slow drainage in more than one fixture at once: This is usually the first sign, because it points to something sitting further down the system rather than one isolated pipe.
Bad smells that keep coming back: No matter how much bleach you throw at it, if the odour returns within days, the cause is deeper than surface residue.
Gurgling toilets or drains: That trapped air is often a sign of a partial blockage building somewhere in the line.
The same drain cleared two or three times this year already: Jetting is usually what actually breaks that cycle, rather than another temporary rod-through.
Older properties and busy commercial kitchens: These tend to need it more often, roughly every 12 to 18 months for higher-risk sites, based on general trade guidance rather than any hard rule.
So, what is drain jetting when you strip away the jargon? A high-pressure clean that clears the blockage and scrubs the whole pipe while it’s at it, no digging required.
Given the UK’s ageing sewer network and how often these things recur, it’s usually worth doing the first time properly rather than patching it every few months.
If you’re stuck with a drain that won’t stay clear, Plumbers 365 handle drain jetting in Bournemouth and across the UK, with fully qualified, insured engineers on call every day of the year. Whether it’s one blocked sink or a full commercial line that needs sorting, our team can get it done properly.
You can book a local engineer directly through Plumbers 365.
What is hydro jetting a drain?
 Same process, different name really. High-pressure water through a hose and nozzle, cleaning the full inside of the pipe rather than just punching through the blockage.
Drain jetting vs rodding, what’s actually different?
 Rodding pushes through the middle and clears a channel. Jetting scours the whole pipe wall on the way through, which is why it tends to last longer before the same problem comes back.
How often does this actually need doing?
 For most houses, only when there’s a problem. Commercial kitchens and places with recurring issues tend to book it in every 12 to 18 months so it doesn’t get to that point.
Can it clear tree roots?
 Smaller root intrusions, yes, with the right nozzle. If the roots have actually cracked the pipe structurally, jetting won’t fix that on its own; you’ll want a camera survey and probably a repair on top.
