Blocked drain in London? Get it unblocked FAST!

As the premier drainage service provider in London, we unblock drains, toilets and sinks. Householders relying on us delivering good old honest value for money drainage services. Our skilled London drainage technicians use the latest equipment to deliver the best service and prices.

Domestic drain unblock
Best value and service guaranteed
No extra charge for jetting
Call William or David for great advice!
020 7870 3205 or 07824 757572

Drainage solutions for London commercial and business customers. We offer the very best value for money service tailored to business customers. So the question is, why choose anyone else? Our expert London engineers are ready and waiting to deliver the very best service for you.

Commercial drain unblock
Call William or David for best price!
020 7870 3205 or 07824 757572
Unblocks include jetting
Proud members of Checkatrade
5665 reviews
9.77 out of 10
National Association of Drainage Contractors

It's easier for you to buy a great service when you're informed. People in London trust us. Businesses in London trust us. With thousands of genuine and independently verified reviews from real customers, our trusted status shines through; our service is second to none.

Trust Happy Drains
* Terms: The drain to be unblocked must serve your house or flat exclusively, be fully accessible (per building regulations), have the appropriate inspection chamber or access point and pipework that has not failed. You have permissions to enter relevant access areas unhindered.

London Blocked Drain Clearance, CCTV Surveys & Repair

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London drain unblocking

London drain unblock priceWith thousands of rave reviews from satisfied customers, look no further than Happy Drains for all your London area drainage needs. Whether in London or the home counties, our network of engineers will get to you FAST.

Our engineers receive regular training to ensure we deliver to you the very best service. Experience and skill plus investment in the best equipment and latest technology helps us to to get your drains fixed good and fixed fast, simply the most highly rated drain and sewer services in the London area. 

How much does it cost to clear a London blocked drain?

Best value and service guaranteed for a London residential dwelling private drain unblock during normal working time. Our price includes jetting, unlike some London drain companies who'll try rods first then charge you extra for jetting.

Blocks of flats and commercial properties depend on complexities.

Please call us for a no-obligation quotation.

You may find lower prices elsewhere, but many London drainage firms will pile on the extras.If it sounds too good to be true it is!If you're comparing prices, make sure you get a fixed price including jetting as some London drain companies charge extra for jetting which we think is wrong. 

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How long does it take to clear a London blocked drain?

How long does it take to clear a London blocked drainThe average London domestic blockage is fat and grease based. To unblock this type of job takes roughly 1-2 hours. Unblocking usually involves rodding or a snake to remove the blockage. For more stubborn blockages high pressure jetting may be the only option.

Best value and service guaranteed for a London residential dwelling during normal working time. Our price includes jetting, unlike some competitors who'll try rods first then charge you extra for jetting.

Who's the best drain company in London?

Who’s the best drain company in LondonWe'll let you decide that, but just take a look at the reviews that drain clearing companies receive from their customers and you'll see that Happy Drains are right up there as a leading provider of drain unblocking and drain repair services.  We have thousands of excellent reviews from very satisfied customers. Here's just a few of them:

Happy Drains are highly rated at Checkatrade!
5665 reviews 9.77 out of 10

Blocked Drain

"From initial contact with excellent customer service, to completing the work including a very reasonable price, everything was absolutely outstanding. Felt we were in safe hands from start to finish. The drain to be cleaned had 30 years of fat to be cleared the problem was identified quickly and completed thoroughly, an advantage of having the correct technical equipment and skills. I have no hesitation in highly recommending Happy Drains to any prospective customer."

Drain clearing.

"I was delighted that my problem was dealt with so quickly The engineer was promt and polite, totally professional. The price quoted was the price invoiced, no silly ad ons. Great company to do business with and I have no hesitation in recommending their service. Sincere thanks."

Sourcing and stopping strong drain smells in new ground floor extension

"For over two years we have suffered from very strong sewage smells and rats getting into our new ground floor extension which made our lives very uncomfortable. Our builder and other drain companies failed to work out the source of the smell. Happy Drains quickly worked out how the smell was getting into the house and sealed it the following week. The smell has disappeared! It was caused by our builder failing to seal a redundant toilet pipe. Happy Drains were efficient, helpful and fast. We are extremely grateful."

Drains Blocked

"Very Pleased with the service provided by Happy Drains - I've use them before because they are so good, quick and efficient - Oh and very reasonable compared to some Drain Cleaners we wont name them but you'll know who I mean. Happy Drains were out the day after Id emailed to say I had a problem with my outside drains completely backed up - not a pretty sight. They kept me advised when they were arriving and what to expect - the engineers were both very able and very friendly - they had the drains unblocked very quickly and with minimum fuss. Highly Recommend - I wouldn't use anyone else."

To clear drains

"I got the number from checkatrade, they were very helpful and arranged a time. Sent a confirmation of order and cost. Was contacted by the worker with a time approx time of arrival. The job was done efficiently and the worker was friendly and very helpful when I asked questions. The cost was exactly what was quoted."

...for more great reviews visit Checkatrade >

London drain responsibility

It's not always obvious who's responsible for a particular section of London drain or sewer pipe, but here's our quick guide to establishing who's responsible for London drains when they get blocked or need repair.

Who's responsible for blocked London drains?

If the drain serves exclusively your property and the blockage in the drain is with your property boundary then that is the owner's responsibility. If it's shared or beyond the property boundary then it’s probably the responsibility of Thames Water.  Our diagram below makes this much clearer. If in doubt, please give us a call for advice.

Who do I contact about a blocked London drain?

Sometimes London drain issues can only be successfully be resolved by an industry professional. At Happy Drains, we're able to restore free-flowing drains to your home or workplace however serious the blockage. Give Happy Drains a call and our team of friendly, professional technicians can get your London drains back in full free flowing working order, from sinks, to toilets, to the main drains – we have skills and leading equipment to restore flow fast.

Do Thames Water unblock London drains?

Thames Water will only clear drains that are their responsibility i.e. shared London drains or beyond your London property boundary. See our diagram below to establish whether your drain could be shared.

How do I contact Thames Water for a shared London drain problem?

If you think you have a shared London drain blockage or problem, you can contact Thames Water via their websites, but check the diagram below first:

Who’s responsible for blocked London drains



If we find the drain is shared and a Thames Water issue we will charge for our site visit and we will refer you to them for further investigation and possible refund of charges.

Diagnosing blocked London drains

How do you know if a drain is blockedIt's not always obvious if a drain is blocked or why it got blocked in the first place, but here's a few pointers to set you in the right direction.

How do you know if a drain is blocked?

An obvious indication that a London drain is blocked is a slow running sink or toilet. Sometimes the toilet over fills or the water even appears to have been sucked out the pan. That is a vacuum caused by a blocked drain downstream of the toilet. Water seepage in the yard or garden is also a likely indication.

Why do drains get blocked?

Never put fats down a London drain! Over time, this will always result in drain blockages. Likewise, paper towels, wet wipes & sanitary products should not be flushed down as they don’t breakdown and result in blockages. Too much paper and cat litter can also be the cause of blocked drains. Remember it’s a toilet not a bin!

Why does my drain keep getting blocked?

There are many factors, but something you need to consider first is professional London drain cleaning. This is because DIY solutions often just don’t work longer term. There could be underlying problems and further investigations are strongly recommended when experiencing regular drain blockages. Cracked or misaligned drains, root damage or accidental damage are common London drain problems that a professional company such as Happy Drains can help you with.

Can a blocked drain cause damp?

No, is the simple answer for a drain in good condition, but broken or cracked drains can cause damp. Drains are designed to be watertight. The water would seep out of a crack or failed joint to cause damp or numerous consequential damage issues. A flooded and overflowing drain will cause damp issues if left unresolved. Our CCTV survey can find all of these problems.

Repairing broken or damaged London drains

Sometimes London drains become blocked or leak due to damage which can result from many causes.

How do you repair a broken London drain?

The site condition would dictate the requirements, but the two main methods are either excavation or no dig technology such as a sleeve inserted within the drain. It depends which option is practical and cost effective based on appropriate investigations. A drainage professional would determine that after visiting site and undertaking a London CCTV drain survey.

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07824 757572

DIY tips for unblocking a London drain

DIY tips for unblocking a London drainIf you have the time and would rather spend your money on the more enjoyable things in life then we fully support DIY unblocking of London drains and here's our guide to help you with that. However, when all else fails, get in touch and rest assured our experts will resolve the problem FAST.

What can I use to unblock a London drain?

Try these tips and tricks for unblocking a London drain yourself:

  1. If it’s a slow running sink, try hot water or a proprietary chemical from a DIY store.
  2. Hire a set of rods, always try to push the blockage down to the next manhole or drain downstream.
  3. If it's a blocked gully , it might be simply leaves blocking the grill. Get a broom handle and scrape the gully grill, that might just to the trick.

How do you clear a London drain downpipe ?

If you can safely dismantle the downpipe, it may be easier to give it a go and clear by hand. If that doesn't work or it's not safe, it may need high pressure jetting or an electromechanical snake. Give us a call and we'll give you the best advice.

What kind of vinegar unclogs London drains?

The acid in white wine vinegar can break down fats.  Pour some baking soda into the sink then a bottle distilled white vinegar into the London drain. Don't be surprised by the audible reaction that occurs. Then poor hot water into the drain, then repeat. This is best for a slow running London drains.

How do you clear a clogged drain at home?

For a sink, shower or toilet boiling water is a simple and effective method. Simply boil water in a kettle pour it carefully directly down the drain. Boiling water is one of the most effective London home remedies melting fats and grease, loosening debris to restore flow.

How do you clear a blocked sink U-bend?

The U-shaped pipe beneath a sink is designed to use water as a seal to stop smells and drainage gasses from drifting back up and out into your home. The shape of the trap also catches heavy debris and if this is allowed to build up it'll result in blockages. It's easy to clear it, and a lot cheaper than calling out a London drain company:

  1. Empty the sink with a bucket, take the water and pour it down the WC.
  2. Put the bucket in place under the trap.
  3. Loosen the trap by undoing the plastic screw coupler, remove it and let the water out into the bucket.
  4. Take a metal coat hanger and run it through the pipe and the trap to dislodge any debris.

Unblocking a London drain with a plunger

Unblocking a London drain with a plungerWe recommend every London home should have one. The plunger one of the best home DIY tools for unblocking sinks and toilets. The toilet plunger is the bigger version. A sink plunger can be small or large, the bigger the plunger creates more plunge power – the magic ingredient.

For sinks, remove the metal strainer in the drain prior to plunging. The secret lies in creating a good seal between the plunger and sink or WC. Get the plunger in place and then get to work, with fast, sharp pumping motions. For toilets, the rubber disc must not be smaller than the U-bend. This is vital to successfully unblock a London toilet. Simply push the plunger up and down fast and hey presto.

Unblock a London drain with a hand driven snake

This simply works by pushing and twisting a thin snaking steel wire into the small-bore pipe work that serves sinks, showers and London baths. The cable is twisted and propelled forward by hand and when it hits the obstruction it dislodges the debris to restore the flow. This task takes a little time and perseverance, you will have to remove the trap before attempting to clear and drain using this technique (see our guide above) but make sure you place a bucket under the trap to catch the water.

How do you unclog a London drain without a snake?

Yes, the use of boiling hot water is often effective, and chemical drain cleaner can be also used. Kinetic force can also be effective, such as a water ram or a simple plunger. This uses the transfer of energy to push the blockage along the pipe. This is effective in a sealed system where there are no connections, so the force is focused forward to dislodge the blockage.

Using soda or cola to unblock a drain

You probably have a bottle or two around your home and it's perfect for unblocking drains. To be effective, your favourite bottle of fizzy pop should be at room temperature and should be full fat, not the diet or lite types. You may recall from science lessons at school what happens to a tooth if you leave in a fizzy drink. The same corrosive quality of your favourite cola does the same to a blockage if poured down the drain and left for an hour or two. Give this method a go. It's a little eco-friendlier compared to a dangerous chemical drain cleaner.

London CCTV Drain Surveys

London CCTV Drain SurveysSometimes the only way to get to the bottom of a London drain problem is to go inside the pipe with a camera and for that, Happy Drains are the no.1 choice of partner to provide such specialist services.

What is a London CCTV drain survey?

A London CCTV drain survey is a detailed examination of your drainage system. The survey will determine the structural condition and the serviceability of the drainpipe. During the inspection we will note all defects and issues to allow you to understand how the drain works and its condition. We use high-tech CCTV cameras that are propelled through the drain to identify and report any issues that might be present.

What is a CCTV drain survey report?

Any professional drain survey should come complete with a written technical report using industry standard software. This details information such as the date, manhole numbers from & to, size of pipe, pipe material, shape, direction, distance (m), lengths, remarks and pictures of relevant observation.

All of this information should be evidenced via a video file for referencing and quality assurance purposes.

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Happy Drains are highly rated at Checkatrade!
5665 reviews 9.77 out of 10

Drain Plunger Removal

"Nail came along to remove a drain plunger that had got stuck in our drainage system outside. Couldn't have been more helpful and managed to get the plunger out. Great guy and great service! Thanks"

Checked drain on driveway and gave advice.

"It was easy to book. The member of staff came within the time window given, was informative and helpful. Then the invoice came through promptly with no unexpected charges. Would use company again."

Unblock manhole and identify why we have an a going issue.

"Happy Drains arrived on time and in fact rang an hour ahead as they knew I had to come home from work. They were very clear, professional and courteous. The problem was not straight forward so they went over and above to resolve it."

Blocked drain cleared

"Tommy was Polite, punctual, did a good job and he took the time to explain how to care for drains etc. Would definitely use again"

...for more great reviews visit Checkatrade >


For London blocked drains we use selected local London professionals.

This ensures London blocked drains are unblocked fast followed by CCTV inspections to get your London repairs in progress.

London drain services from a firm receiving great feedback...

Happy Drains are highly rated at Checkatrade!
5665 reviews 9.77 out of 10

Drain jetting to a residential property.

"Great service from start to finish, very prompt and very professional. Thank you."

Unblocking of below ground drainage

"Brilliant job well done by a great team. Super efficient, great value and awesome customer service by the engineer and the team at head office. Strongly recommend."

Drain clearing

"After hours of trying to clear a blocked drain I rung Happy Drains. Nice guy arrived half hour after a phone call to say he was on the way at the agreed time of booking.I was amazed at how quickly the jetter cleaned my drains and cleared any blockages . The price was favourable .Thank you Happy Drains , I will never bother struggling again"

Blocked drain and toilet

"Excellent service ! Rang on a Sunday and plumber then called me back that day to discuss and arrange appointment for next day . They accessed using side gate as I had to be at work. Sent text when done and invoice included photos and all work carried out . Very pleased. I even noticed the path had been swept down a bit. Invoice was prompt and easy to pay . Would recommend and use again if needed. Price was v fair I felt . I rang another company who had triple charge and needed to access my house which would have proved tricky if I am honest . Great service. Great company."

Toilet blocked

"The plumber arrived when they said and was very polite listened and straight away knew what it was,cracked on with his job was done in an hour kept at it didn't have to prompt him or even help him very nice chap would definitely recommend these guys to family and friends good luck guys"

Unblocked drain

"Arrived as agreed, fixed the issue, checked work, all with a problem"

Kitchen Sink blocked wouldn't drain at all

"I had been struggling with a blocked kitchen sink for two days, I had tried all the DIY methods, Plungers, Drain snakes, Kettles of hot water and various combinations of all three and got no improvement. Happy drains answered my Checkatrade Urgent Job request within 20 Mins, Shaun arrived on time and well equipped to fix the problem, whole job took approx 45mins and he left with my drains working better than ever as they hadn't been cleaned in a while, Top Stuff and great simple, reasonably priced service from Happy Drains, Recommended"

External drain blocked

"Found this supplier via Checkatrade, they responded promptly and agreed a time for a tradesperson to attend our house. He call prior to arrival to confirm he was on his way, arrived and found the problem quickly (which was roots growing into the drain. He cleared the problem and flushed the system and then cleaned the area. A really nice chap, friendly polite and professional"

Blocked outside drain.

"Excellent experience, Damian was great, efficient, quick, just got the job done. In the end the blockage needed jetting, but that was not a problem and no extra cost. He came out within 24 hours of a phone call. Would certainly use Happy Drains again."

Drain unblocking

"Prompt and efficient, pleasant tidy guy, good result and competitive price"

Unblocking a very blocked kitchen drain!

"Called Happy Drains late one evening to unblock our main kitchen drain which was crucial to dealing with the aftermath of a huge birthday party. Thankfully the wonderful plumber came as he said he would at noon and within twenty minutes had fixed the problem and checked that all was working both inside in the sinks and outside in the sewer lines. He cleared up carefully and very politely took his leave. A very satisfying experience!"

Jetting of drains

"The guy called me half an hour before he was due to tell me he was on his way which I like. He turned up I showed him where the drains were and explained the issue. He then proceeded to do what he needed to do to get the job done. He made sure there was no mess once he had finished and confirmed all done and explained what he had done. Excellent service would highly recommend."



Emergency drain clearance

"Came 3 hours after our initial telephone call. The men were extremely polite, knowledgeable and fast. Thank you"

Clearing outdoor Kitchen Drain

"Called at mid-day and within 2.5hrs they arrived and fixed the problem (I was expecting to need to wait and book it in). Amazing customer service and a lovely team to deal with. Would highly recommend them to anybody! Will definitely be using them again when I need assistance."

Unblocking outdoor drain

"Happy Drains was able to send someone out on the same day. I was given a 4 hour time window and got a call 30 minutes before arrival. The work was completed very quickly and professionally and the drain is completely clear. Great work and I would fully recommend."

Drainage issue

"Found the drain outside our kitchen window was blocked. I googled Checkatrade for a company in my area. I found Happy Drains and I must say their name is very apt as I was very happy to have found them. The person who took my call was very helpful and arranged for someone to attend that day. The engineer called ahead and gave me an accurate arrival time. When he arrived he was very efficient and was able to find the blockage and remove it. He made sure the area was clean afterwards. He is a credit to the company. I am very pleased with all aspects of the service."

Drain / Sewer Clearance

"Initial request via Checkatrade was made and Happy Drains Ltd called me within seconds - I was given a cost and timeslot within 15 mins. The Engineer arrived on time, fixed the issue and left everything tidy - all within just over an hour from initial inquiry. Brilliant - Thanks Happy Drains Ltd :) Everyone I spoke to was friendly and helpful - I can highly recommend the Happy Drains team."

...for more great reviews visit Checkatrade >

or our office mobile
07824 757572

or our office mobile
07824 757572