Blocked Drains

We know how stressful it is to have a blocked drain at your property. That’s why we aim to have one of our specialists to you quickly if you need a drain unblocking.

The fact that a blocked drain can easily overflow and cause a health hazard means there’s little time to wait. Our team of specialists are available 24 hours a day, 365 days a year to help with unblocking your drains. Whether you’re a commercial or residential property owner, we can help wherever you are in London or around the M25.

What we do

We fix problems with drains at hundreds of residential properties in London every month. Our work also includes commercial properties, such as offices, restaurants, schools, hotels and retail. As one of London’s largest drainage contractors, we’re experienced at resolving the problems that homes and businesses face in keeping their drain network clear, free-flowing and problem free.

Knowledge sharing and diagnosing

All our experts are reliable and professional. They’ll share their knowledge with you on-site so that you know exactly what’s going on at all times. This means you’re never in the dark, and you can make informed decisions for the best results. 

Our ability to diagnose and solve drain problems comes from 16 years of professional experience, and we’ve seen it all. For prevention tips, investigations and problem solving, our team is ready.  

Preventative maintenance 

Because we know the problems that commercial properties can face on a daily basis, we offer preventative maintenance contracts. Regular checks and cleaning will keep your drains working properly and help reduce the risk of blockages. How often you need them cleaning will depend on your property; get in touch with us today to discuss how we can help.

Surveying and mapping

Using high quality camera equipment, we can perform full mapping of drainage systems. This will highlight any problem areas and repairs that need attention. Mapping will provide a detailed plan of the network, including depth, location, and direction of the pipes. 

You’ll also be able to see the condition of existing pipes. All of this is vital information when planning and carrying out construction work on any property. 

We offer pre-purchase surveys for prospective home-buyers. CCTV cameras will show the condition of the property’s drains and pinpoint any potential issues. Repair costs can mount up and that isn’t ideal when you’ve just moved in. Remove the uncertainty with a drain survey. 


Internal drainage issues pose many inconveniences. As a fully accredited drainage contractor, all our tradespeople are equipped with the best machinery to tackle blockages in sinks, showers, toilets and baths. From toilet augers to drain rods, our experts have the right equipment to clear your blocked drains of stubborn debris.

For those external problems, some more heavy duty equipment is required. Our engineers have rods, high pressure water jets and high velocity coring equipment which can tackle hardened cement, solidified construction adhesives, and more. 

Customer reviews

  • Came late at night, worked hard to deal with pipe blockage (and flood) in the flat but main blockage was further down i.e. responsibility of building manager - told us exactly what to say to the manager to get it sorted! Many thanks.

    Anne, Camden, NW1

  • What a great and fast service from Aspect in our time of need. The drain engineer was with us within 2 hours - knew his stuff - not at all daunted and he got the drain running free again. Thank you ever so much for helping us out. Will not hesitate to recommend.

    Kavanagh, Borehamwood, WD6

  • Excellent service. I called this morning at 8am and a technician was out by 12:30. Reece was polite and friendly and sorted out the clogged drain in no time flat. Would absolutely call Aspect again and recommend them highly.

    Van, Greenwich, SE10

Common causes of blocked drains

If your drains are slow running, it’s advisable to get them cleaned and avoid them becoming fully blocked. However, if your drains need unblocking our engineers can fix the problem, no matter what type of drain clearance you need:

Hard water areas, including London, are particularly prone to blockages due to build-up of  mineral content (scale). Solid deposits of minerals can form over time, leading to narrowing of pipes and eventually to blocked drains.

Household items
Wet wipes are one of the most common causes of blockages, along with sanitary products like tampons. They’re both commonly flushed down the toilet, as are cotton buds and cotton pads. Any man-made products that aren’t designed to break down quickly in water can cause blockages.

Kitchen paper and tissues can cause blockages if they’re flushed down toilets. Toilet paper is specifically designed to break down quickly in water.

Grease & fats
Though small amounts seem harmless at the time, grease and fats can harden together when they get rinsed down the kitchen sink. These build-ups are often found in drains around blocks of flats or house conversions. This is because the extra volume produced by multiple homes connected to the same drain system.

The drains can’t match the extra demands being placed upon it from multiple residences.

Garden waste
External drains can get clogged up from garden waste and litter. Leaves, twigs, silt, stones and other garden debris can find their way in, as can plastic bags and other rubbish. This usually happens when they get caught up in rainwater flow.

No hidden extras

What you get from Aspect

  • Experienced & vetted tradespeople
  • 24 hour availability for all trades
  • Dedicated Service Support Manager
  • Aspect Guarantee on workmanship
  • Peace of mind from trade accreditation

Occasional extra costs

  • Parts and materials used
  • Collection of parts and materials
  • Ultra Low Emission Zone (ULEZ) charge

We won’t charge you for

  • Cost of parking
  • Fuel or travel time
  • Congestion Charge

Our drain unblocking techniques

All of our engineers have a range of mechanical equipment and tools to carry out drain unblocking.

  1. High-pressure drain jetting equipment

These machines are capable of breaking up any type of material that’s causing a blockage. The power of this equipment limits its use to secondary (external) pipework. This is because it could easily cause damage to primary pipework inside a property.

  1. Electro-mechanical ‘sani-snakes’

The electric motors in these machines allow our engineers to push a rotating, flexible cable into pipework. Different attachments allow them to push through any type of blockage, including scale and fat deposits. They are portable and are ideal for unblocking internal, primary drainage pipework.

  1. Drain rods

The more traditional rods are still a very effective way of unblocking external and secondary (internal) pipework. Sections of strong but flexible rod are attached together and pushed by hand into the drain. A range of different attachments can be fitted to the end depending on the blockage that needs to be cleared.

  1. Coring machines

For the more stubborn unblocking jobs, such as scale build-up, a more powerful machine is needed. A coring machine can remove blockages in pipes with a diameter of up to 150mm. It does what it says – it cores through the blockage so that the drain can flow freely again.

  1. Drain cameras

If the location or cause of a blocked drain proves difficult to identify, CCTV camera equipment can be used. This equipment will clearly identify the blockage, and record any defects in the drainage network that could be causing it. For example, places where tree roots have broken through a fractured pipe.

Cameras are also used to show customers their blockages have been properly cleared.

Building waste blocking drains

Another common reason for our tradespeople to be called out is unblocking drains following building or renovation work. Often, left behind materials from extensions or refurbishments get hosed away and washed down an external drain. Ideally, this should be avoided and the waste should be collected into a skip for proper disposal.

Building materials that cause blockages include:

  • Plaster
  • Adhesives and sealant
  • Sand and gravel
  • Cement
  • Grout
  • Putty
  • Rubble

Our drain specialists can remove all of this debris. Even if cement, plaster, and other adhesives have solidified we can still remove them from drains using high velocity boring equipment.

Some of our accreditations

We’re fully trade accredited. Aspect is registered with the National Association of Drainage Contractors (NADC). When you book an Aspect drainage specialist you can count on getting the professional expertise you’re looking for.

Need more info before booking? Someone from our team can call you.  Request a callback

Account customers

We have a dedicated team of account handlers to support multi-site customers and commercial properties: Restaurants, Bars, Offices, Retail, Landlords, Letting Agencies, Hotels, Schools, Embassies, Care Homes and more

Knowledge sharing & research articles

  • Overflowing drains: Causes and prevention

    We all want to avoid our drains from getting blocked if possible. Our drainage engineers have highlighted some of the most common reasons for drains to get blocked, and provided tips for you to prevent it from happening... Advice to prevent blockages

  • Detecting leaks in mains water supply pipes

    A higher than expected bill from your water supply company is sometimes a good indication of a leak. However, there could be a number of other reasons too. This article covers reasons why your water bill could be higher than usual... Underground plumbing leaks

  • Common workplace complaints uncovered

    With more than 80% of people saying their workplace is “unpleasant”, our research team looked into the main complaints. Find out how drainage problems ranked against other issues such as temperature, lighting and noises... Maintenance issues at work

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