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Drain Cleaning in Dorchester

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

Call 0330 133 1625 Request a quote

What is drain cleaning, and how is it different from unblocking?

Drain cleaning removes the build-up lining a pipe before it becomes a blockage, whereas unblocking clears a pipe that has already stopped. Cleaning treats the whole run; unblocking only needs to get water moving again.

An unblocking visit punches a way through the obstruction and proves the flow. A cleaning visit goes further, working along the full length of the drain to strip fat, scale, silt and root growth back towards the pipe wall, so the bore is closer to its original size. It is the difference between today's problem going away and the next one being months or years further off.

Signs your drains need cleaning

If you are calling someone out every few months, the drain is telling you something. Repeat blockages, slow fittings and recurring smells are the usual signs that build-up has narrowed the pipe.

Other signs include gurgling from plugholes after a flush, a gully that is slow to clear after rain, and water that drains normally most of the time but backs up when several fittings are used at once. Cleaning the full run, rather than punching a hole through the blockage, removes the build-up that keeps re-forming in the same spot.

If water is already backing up into the house, or a chamber is overflowing, the drain is past the point of planned cleaning. Call us on 0330 133 1625 and treat it as an emergency unblocking first.

What builds up inside a drain?

Fat, scale, silt and roots are the four things that most often narrow a drain over time. Each sticks to the pipe wall and catches what passes, so the narrowing speeds up as it goes.

Cooking fat sets as it cools and coats the upper part of the pipe. Soap and hard water leave a scale that roughens the wall. Silt and grit settle wherever the flow slows, especially in surface water drains and runs with a shallow fall. Roots enter through small gaps at joints and form fibrous mats. Wipes and paper then catch on all of these, which is usually what finally stops the drain.

Which properties benefit most, and how often?

Properties with long runs, shallow falls, mature trees nearby or heavy kitchen use benefit most from regular cleaning. A quiet flat with a short run to the sewer usually does not need it, and we will say so.

There is no single right interval. A busy family home with a history of blockages might benefit from a clean once a year, a commercial kitchen far more often, and many homes never. We base the recommendation on what we find in the pipe, how fast it is building up and what the property puts down it, rather than selling you a schedule you do not need.

How we clean a drain, step by step

We assess the pipe first, clean the full run with the method that suits it, then check the result. Cleaning blind risks damaging a pipe that is already weak, so the same order applies to every home and business we clean for in Dorchester.

  • We lift the chambers and look at what is building up and where
  • We inspect the pipe with a camera, included in the price, so we know its condition before and after cleaning
  • We clean each run between chambers, working against the build-up rather than just through it
  • We flush the debris through and check every chamber is running clear
  • We tell you the condition of the pipe and when it is worth looking again

If the clean uncovers damage, we stop and show you before suggesting anything else.

Is drain jetting safe for every pipe?

No. Jetting is the most thorough way to clean a sound pipe, but on weak or damaged pipework the force of the water can make existing damage worse.

Jetting sends water through a hose and nozzle to scour the full circumference of the pipe, which suits fat, scale and silt in plastic and sound clay drains. Pitch fibre pipes, which can blister and deform with age, badly cracked clay, and runs with open joints need a gentler approach. Where we are not sure what we are dealing with, we look with a camera first and choose a lower-force method, or recommend a repair instead.

How long does drain cleaning take?

Cleaning a typical domestic drain takes a couple of hours, depending on the number of runs and how much build-up is in them. Commercial systems with several branches take longer.

The time goes on access to each chamber, the length of each run, and how hard the build-up is. Soft silt flushes through quickly; years of set fat needs several passes. The camera inspection that comes with the clean adds a little time to the visit. We give you an idea of timing when we agree the price, and tell you if something changes it on the day.

How much does drain cleaning cost?

The cost depends on how much pipe there is and how thick the deposits are, and a camera inspection of the drain is included at no extra charge. The price is fixed and agreed with you before the clean begins. As a guide, cleaning the drains at a typical house costs £80 to £200.

The main factors are:

  • The number of chambers and the total length of run
  • The type of build-up, since hardened fat and scale take longer than silt
  • Access to the chambers, and whether any are buried or seized
  • Whether you also want a full written survey report, which is a separate service

If cleaning uncovers something that changes the job, we stop, show you and agree any extra work before going on.

What we tell you afterwards

If the pipe is in good condition, we say so and suggest when to look again. If cleaning reveals damage underneath the build-up, you get that finding and the options, not a recommendation to keep cleaning a pipe that needs repairing.

Cleaning cannot fix a cracked pipe, a dropped joint, a dip that holds water or a section that has collapsed. These defects catch debris, so a damaged drain blocks again however often it is cleaned. Where we find one, the options are usually a patch repair, a full liner or excavation, and we explain which suits the fault. Any survey footage we take is yours.

Can drain cleaning cure a drain smell?

Sometimes. If the smell comes from build-up rotting inside the drain or a foul gully, cleaning removes it, but many drain smells in a house have a different cause that cleaning will not touch.

Check these first, roughly in order of how often they cause it:

  • A trap that has dried out in a rarely used basin, shower or floor drain
  • A failed seal where the toilet pan meets the soil pipe
  • A faulty air admittance valve on a soil pipe or waste
  • A blocked or damaged vent at the top of the soil stack
  • An outside gully with dirty water standing in it
  • A cracked or open-jointed drain under the floor

If none of the simple checks explains it, a camera survey shows whether sewer air is escaping from the drain itself.

What can I do between professional cleans?

What goes down the drain matters more than any product you put down after it. Keeping fat, wipes and silt out keeps a clean drain clean for longer.

  • Bin cooled fat and food scraps instead of washing them away
  • Keep wipes, sanitary items and cotton buds out of toilets
  • Fit strainers in sinks and hair catchers in showers
  • Clear leaves and grit from gully grids, especially after autumn
  • Run water through rarely used fittings every few weeks so their traps stay full

Avoid pouring caustic cleaners into drains as routine maintenance. They are hazardous to handle and do little against established build-up.

Who is responsible for cleaning the drains?

Homeowners are responsible for cleaning drains that serve only their property and sit inside their boundary. Shared drains and the public sewer are the water company's to maintain.

For homes in the Dorchester area that is Wessex Water, which took on private shared sewers and lateral drains in England and Wales on 1 October 2011. In rented homes the landlord is responsible for keeping the drains in repair. Businesses are responsible for their own private drainage, and food businesses in particular are expected to stop fat reaching the sewer, since it is an offence to put anything into a public sewer that interferes with its flow.

Covering Dorchester & the local area

We provide drain cleaning 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

CCTV Drain Surveys

Camera survey of the run, so decisions are made on what is actually there.

Learn more

Drain Cleaning: common questions

Do you offer drain cleaning maintenance contracts?
We recommend an interval based on what we find in your drains and you book the next visit when it is due, rather than signing up to a subscription. That keeps the frequency honest: if your drains stay clean, the gap gets longer. For businesses that need visits planned around trading hours, we can arrange cleaning on a regular footing and keep a record of each visit.
Will drain cleaning fix a slow drain?
It will if the slowness is caused by build-up narrowing the pipe, which is the usual reason. It will not if the pipe has a dip, a sag or a dropped joint, because the water and debris will collect there again. If a drain is still slow after a full clean, a camera survey is the way to find out why.
Are chemical or enzyme drain cleaners a good alternative?
Not for a drain that already has a problem. Caustic and acid cleaners are dangerous to handle and rarely reach build-up deep in an underground pipe at any strength. Enzyme and bacterial products are gentler and may slow the build-up of fat in a kitchen waste, but they do not remove what is already there, and they cannot shift silt, scale or roots.
Why does my house smell of sewage?
A sewage smell indoors means sewer air is getting past a seal somewhere. The commonest causes are a dried-out trap, a failed toilet seal and a faulty air admittance valve, all of which are cheap to fix. Less often it is a cracked drain under the floor. Run water in every fitting first, since that alone often cures it.
Can a dried-out trap really cause a sewage smell?
Yes, and it is one of the most common causes. Each trap holds a small amount of water that blocks sewer air from the room. In a spare bathroom, utility floor drain or unused shower, that water evaporates over a few weeks and the barrier is gone. Running the tap for half a minute refills it.
What is an air admittance valve, and could mine have failed?
An air admittance valve is a one-way valve fitted to a soil pipe or waste, often in a loft, boxing or under a basin. It lets air into the system as water drains, so traps are not sucked dry, and closes to keep smells in. If it sticks open, sewer air escapes into the house. A failed valve is a straightforward replacement.
Why can I smell the drains outside but not inside?
An outside-only smell usually comes from a gully with standing dirty water, a gully trap that has dried out in hot weather, or a chamber cover that no longer seals. It can also come from the vent at the top of the soil stack. If the smell is strongest near a chamber, the drain beneath it may be partly blocked and holding waste.
Is a smell from the drains dangerous?
Usually it is a nuisance rather than a hazard, but it should not be ignored. Sewer air can contain hydrogen sulphide and bacteria, and a persistent smell means there is a gap in the system that may also let in damp or rats. Never climb into or lean into a drain chamber, where gases can collect in harmful concentrations.
Should I get a CCTV survey for a drain smell?
Only after the simple checks have been ruled out: refilling traps, checking the toilet seal and testing any air admittance valves. If the smell persists, a camera survey shows whether the drain itself is cracked, open-jointed or holding waste. The cost of a survey depends on how many runs need inspecting and how easy they are to access, and we agree it before we start.
Does drain cleaning remove tree roots?
Cleaning removes roots growing inside the pipe, and a clean run flows freely again afterwards. It does not stop them coming back, because roots enter through a gap at a joint or crack that is still there. Roots will grow back in time. Sealing the entry point with a patch repair or liner is the long-term fix.