24/7 emergency drainage

0330 133 1625
AVAILABLE NOW · Emergency drain engineers · Call for a fast response
Call Now

High-Pressure Drain Jetting in Dorchester

Water at pressure to strip fat, silt and root matter back to the pipe wall.

Call 0330 133 1625 Request a quote

What is high-pressure drain jetting?

Drain jetting is cleaning the inside of a drain with water driven at high pressure through a hose and nozzle, which scours deposits off the pipe wall and flushes them away.

The hose goes in from a manhole, gully or rodding point. Jets angled backwards on the nozzle pull it along the pipe, while forward jets break up whatever sits in front. Because the water reaches the whole circumference, jetting cleans the bore rather than just opening a path through a blockage. That is why it is the usual answer for drains that silt up, fat up or keep blocking in the same place. We jet domestic and commercial drains across Dorchester, from short kitchen runs to the main line out to the sewer.

What can drain jetting remove?

Jetting removes the soft and semi-hard material that builds up inside a pipe over time: fat, grease, silt, sludge, scale, paper, wipes and fine root growth.

  • Kitchen fat and grease that has set in layers along the pipe wall
  • Silt, sand and grit washed in from yards, gullies and driveways
  • Wet wipes and sanitary products caught on a joint
  • Soap and limescale deposits in waste runs
  • Fine roots that have come in through a joint

It is less effective on anything hard and fixed. Concrete or mortar that has set in the pipe, heavy woody roots and dense debris such as stones or rubble usually need cutting heads, or lifting out by hand at a chamber.

Signs your drain needs jetting rather than a quick clear

If a drain has been cleared before and is slow again within weeks or months, the pipe wall is probably coated, and another rod through the middle will not last.

Other signs point the same way:

  • Several fittings draining slowly, not just one
  • Gurgling from plugholes or the toilet when something else empties
  • A chamber where the water sits higher than it should, or tide marks on the benching
  • A stale, greasy smell from a kitchen gully
  • Gullies that fill with silt after every spell of heavy rain

None of these proves the cause on its own. That is why we look in the chamber before choosing a method.

Jetting or rodding: which does my drain need?

Rodding suits a single soft obstruction near an access point; jetting suits a pipe that is coated along its length or a blockage that keeps coming back.

Rods push or twist through a blockage and reopen flow quickly, which is often all a one-off toilet blockage needs. But a rod leaves most of the deposit on the wall, so a drain lined with fat or silt narrows again quickly. Jetting takes that layer off. On fragile or damaged pipework the choice can reverse: careful rodding, or a camera survey first, is safer than putting pressure into a pipe that is already failing. We decide pipe by pipe, not by job type.

Pressure, flow and nozzles: why the set-up matters

Good jetting comes from matching water volume, pressure and nozzle to the size and material of the pipe, not from using all the force the machine has.

Pressure gives the cutting edge. Flow, the volume of water moving through, is what carries loosened debris away. High pressure with too little flow can cut a channel and leave the debris sitting further down the line. Nozzles differ too: some are built to punch through a blockage, some to sweep the whole wall, and some rotate to cut roots or scale. A narrow internal waste needs a smaller hose and a gentler setting than a main outside run. Getting this wrong is how pipes get damaged and jobs get left half done.

How we jet a drain, step by step

We find out what the pipe is and where the problem sits before any water goes in, then jet the run and check the result before we leave.

  • We ask what has been happening and lift the chambers to see where water is standing.
  • We identify the pipe material. Where it looks old, damaged or unfamiliar, a camera goes in before the jet does.
  • We protect the area round the access point and choose the hose and nozzle for the pipe.
  • We jet the run, working the nozzle back and forth over the problem section until the deposit comes away.
  • Where debris can be reached at a chamber, we lift it out.
  • We run water through the fittings to confirm the flow and tell you what we found.

If we find a defect along the way, we stop and show you before anything changes, and any change to the work is priced and agreed first.

Can drain jetting damage my pipes?

Jetting at the right setting does not harm a sound pipe, but it can make existing damage worse, so the condition of the pipe has to be known before the pressure goes in.

The risks are specific. Pitch fibre, a bitumen-impregnated fibre pipe widely laid between the 1950s and the 1970s, softens and blisters with age, and a jet can strip its inner layers. Clay pipe with open cracks or missing pieces can lose more under pressure. A displaced joint can send water and the nozzle into the surrounding ground. Where we see any of these, we reduce the pressure, change method or survey before going further. A pipe that needs repairing does not need jetting harder.

What jetting can and can't fix

Jetting fixes build-up inside a pipe; it does not fix the pipe itself. A cracked, sagging, displaced or collapsed drain gets flow back for a while at best.

  • It can fix: fat and grease lining, silt and grit, scale, wipes and paper, light root growth.
  • It can't fix: a collapsed section, a sag where water lies in the pipe, a joint that has slipped out of line, or a crack letting roots and soil in.

A sag is a good example. Jetting empties it, but the low point keeps collecting water and solids, so it fills again. In cases like that, the useful result of jetting is a pipe clean enough to survey properly, and the survey tells you what the repair should be.

Can jetting clear tree roots?

Jetting clears fine roots and, with a rotating cutting head, can cut back heavier growth, but it does not stop roots returning, because they come back through the same defect.

Roots enter at a crack or an open joint and grow towards the water inside. A root mass can be cut back to the pipe wall and flushed out, and hard deposits can be descaled at the same visit. Large woody roots that have already broken the pipe are a different job, as cutting them out can leave very little pipe behind. After root removal we recommend a camera check of that section, so you can see the entry point and decide whether to line or repair it.

How much does drain jetting cost?

The cost of jetting depends mainly on how much pipe needs cleaning, how heavy the deposit is and how easy the access is. As a guide, most drain jetting jobs cost between £150 and £300. You know the full figure, and have said yes to it, before the hose goes in.

The things that move the price:

  • The length of the run and the number of sections between chambers
  • What is in the pipe, since loose silt clears faster than set fat or roots
  • Access, including chambers that are buried, sealed or indoors
  • Whether a camera survey is needed before or after
  • Whether waste has to be taken off site rather than flushed on

Should the camera or the jet reveal a broken pipe or another surprise, work pauses while we show you the problem and agree any revised price.

Who pays for jetting a drain?

If the drain carries only your household's waste and sits within your boundary, jetting it is your cost. A drain shared with neighbours, or the sewer it joins, is usually Wessex Water's responsibility in Dorchester.

Shared runs and lateral drains have been the water companies' responsibility in England and Wales since 1 October 2011. If the build-up is in a shared run, Wessex Water should deal with it at no cost to you. In a rented home, clearing a blocked drain is normally the landlord's job unless the tenant's own use caused it. We tell you whose pipe it is before you pay us to work on it.

Can I jet my own drain with a pressure washer?

You can safely scoop out a gully and flush it with buckets of water, but jetting a drain with a patio pressure washer is a poor idea.

Domestic pressure washers are not made to work inside pipes. Drain hose attachments exist, but there is little flow behind them, so debris tends to be pushed further down the line rather than carried away. The bigger risk is spray: water forced back out of a chamber brings whatever was in the drain with it.

What is worth trying: lift a gully grid wearing gloves and clear out leaves and silt, check whether the next chamber down is full, and stop running water if it is. Chemical cleaners rarely touch set fat in an outside run, so save your money.

Keeping a drain clear after jetting

A jetted drain stays clear longest when fat, wipes and silt are kept out of it in the first place.

  • Let cooking fat cool, then bin it, and wipe greasy pans before washing them.
  • Use strainers in kitchen sinks and over bath and shower wastes.
  • Bin wipes, including the ones labelled flushable.
  • Clear leaves and silt out of yard gullies before winter.
  • Keep access covers uncovered so the drain can be checked.

Some drains need periodic jetting whatever you do, usually ones with shallow falls or heavy kitchen use. If yours is one of them, we suggest an interval based on what we see in the pipe rather than a schedule picked from a list.

Covering Dorchester & the local area

We provide high-pressure jetting throughout Charminster, Martinstown, Crossways, Puddletown, Broadmayne, Poundbury and the surrounding area. Call 0330 133 1625 for a free, no-obligation quote.

How it works

Simple, transparent process

  1. 1

    Tell us what’s happening

    Call and describe what you’re seeing — a slow sink, a gurgle, a smell or standing water. It usually tells us a lot before we arrive.

  2. 2

    We find the cause

    We clear enough to get flow back, then work out why it blocked — because a drain that blocks twice has a reason.

  3. 3

    A price before the work

    If it needs more than a clear — a repair, a lining, a survey — you get the price and the reason before we start it.

  4. 4

    You see the evidence

    Where we survey, you get the footage. Where we repair, you see the before and after.

Don't let it get worse

Get expert help right now

Tell us what the drain is doing and we will explain what is likely causing it and what the work involves.

Call 24/70330 133 1625

Other services

Emergency Unblocking

A drain that has stopped completely, water backing up or sewage escaping — the jobs that cannot wait until Monday.

Learn more

Blocked Sinks

Kitchen sinks, basins, baths and showers draining slowly or not at all.

Learn more

Drain Cleaning

Clearing build-up before it becomes a blockage — for properties that keep having the same problem.

Learn more

High-Pressure Jetting: common questions

How long does drain jetting take?
A single silted or greasy domestic run is usually jetted in one visit, often within a couple of hours. Longer runs, heavy fat, root cutting or awkward access take longer, and a camera survey before or after adds time. Commercial kitchen drains often take longer because the build-up is heavier and the work is planned around opening hours. Once we have seen the access, we can give you a realistic idea of how long your job will take.
Is drain jetting safe for the environment?
Jetting uses plain water with no chemicals, which makes it one of the cleaner ways to clear a drain. What it loosens is ordinary drain waste. Large amounts of fat or debris are better lifted out at a chamber than flushed into the public sewer, where they can form a blockage further on, and sending material into a public sewer that obstructs it is an offence under the 1991 Water Industry Act.
Can you jet drains inside the house as well as outside?
Yes. Internal wastes and soil pipes can be jetted with a smaller hose and a lower setting suited to narrow plastic pipe. Access is usually through a rodding eye, an access cap on the soil stack, or by taking a trap off. We protect floors and fittings first. Where the blockage is in a trap under a sink, dismantling and cleaning it by hand is often quicker than jetting.
Is drain jetting messy?
Most of the work happens inside the pipe, but some spray and debris can come back out at the access point, especially at the moment a blockage gives way. We cover the area round the chamber, keep the nozzle in the pipe while the water is running and clean up at the end. Indoor access is messier than outdoor, so it helps if the space around it is cleared before we arrive.
How often should drains be professionally jetted?
Most household drains never need routine jetting; they need attention only when something goes wrong. Regular jetting makes sense where a drain has a known weakness, such as a shallow fall, a sag or heavy kitchen use, or where a food business sends a lot of fat down the line. The right interval comes from how quickly the pipe re-coats, which a camera check after cleaning can show.
What is drain descaling?
Descaling is removing hard deposits from inside a pipe: limescale, fat that has hardened like wax, or concrete and mortar that has found its way into the drain. Soft deposits come away with an ordinary jetting nozzle, but scale needs a rotating cutter or a specialist head that grinds it off. On older pipes it takes extra care, because the deposit can be stronger than the pipe wall beneath it.
Do I need to be at home while you jet the drain?
Someone usually needs to be there at the start and the end. We agree the price and the access with you before we begin, and at the finish we run water through the fittings indoors to prove the drain is flowing. If every chamber is outside and the work has been agreed in advance, you may not need to stay for the whole job. Tell us when you call and we will plan around it.
Will jetting get rid of a smell from my drains?
Jetting cures a smell when the cause is rotting fat, silt or waste sitting in the pipe. It will not cure a smell from a cracked pipe, a dried-out trap, a loose toilet seal or a failed vent, because those are faults rather than deposits. If the smell returns soon after jetting, a camera survey of the run is the sensible next step to find where it is coming from.
Should I keep paying to jet a drain that keeps blocking?
No. If a drain needs jetting every few months, something is causing it: a sag, a displaced joint, root entry or a fat problem upstream. Each clean buys time without fixing anything. A camera survey after jetting shows which it is, and one repair, or a change in what goes down the drain, usually works out cheaper than a string of repeat visits.
When is a blocked drain urgent enough to call out at night?
Call straight away if sewage is coming up inside, the only toilet in the house will not empty, or a chamber is overflowing across a garden, path or road. Those get worse every time water is used. A slow sink or a gully that drains eventually can usually wait for a daytime visit. We take calls 24/7 on 0330 133 1625, so ring and describe it if you are unsure.