Blocked drain, overflowing toilet, or a persistent foul smell you just can’t trace? Our specialist drainage engineers are ready to respond across London — clearing blockages fast, diagnosing hidden issues, and repairing damaged drains properly. Upfront pricing, no hidden call-out charges, and same-day availability.
Clear My Drain Call Us Now: +44 7400 265421
London’s Drainage Specialists — Cleared, Surveyed & Repaired Right
Drainage problems rarely announce themselves politely. One day your sink drains slowly; the next, water is backing up into the bath and the smell is unbearable. At Catalyst Home Services, our drainage engineers work across London handling everything from straightforward blocked drain clearance to complex sewer line repairs.
We use professional equipment — including high-pressure water jetting and CCTV camera technology — to get to the root of the problem quickly and clear it properly. Whether you need a fast response to an emergency or a planned CCTV drain survey before buying a property, our team covers it all. Explore our full range of plumbing and drainage services or find out why London customers choose us.
Our Drainage Services in London
From a single blocked sink to a collapsed sewer, our engineers have the skills and equipment to handle every drainage challenge a London property can throw at them.
Blocked Drain Clearance
A blocked drain is more than an inconvenience — left untreated, it can cause water to back up, damage your property, and create a health hazard. Our engineers use high-pressure water jetting to blast through blockages caused by grease, debris, and root ingrowth, restoring full flow and leaving the drain clean. Most blockages are cleared on the first visit.
Find out more about our blocked drain clearance service →
Blocked Toilet Unblocking
A blocked toilet is one of the most disruptive plumbing problems a household can face. Whether it’s caused by a build-up of non-flushable wipes, an object lodged in the trap, or a deeper blockage in the soil stack, our engineers identify the cause quickly and clear it cleanly — without unnecessary mess or disruption to your bathroom.
Find out more about our blocked toilet unblocking service →
CCTV Drain Survey
When drainage problems keep coming back — or you’re buying a property and want certainty — a CCTV drain survey gives you a full picture of what’s happening inside your pipes. Our engineers feed a high-definition camera through the drainage system, recording exactly what they find: cracks, root intrusions, blockages, or collapsed sections. You get a clear report with footage and recommendations.
Find out more about our CCTV drain survey service →
Sewer Line Repair
A cracked, collapsed, or root-damaged sewer line can cause serious problems — from persistent blockages and foul smells to subsidence if left untreated. Our engineers carry out full sewer line assessments and repairs, using no-dig methods such as pipe relining wherever possible to minimise disruption to your garden and driveway. Where excavation is unavoidable, we plan the work carefully and tidy up after.
Find out more about our sewer line repair service →
Why Choose Catalyst for Drainage Work in London
Specialist Drainage Engineers, Properly Qualified
Drainage isn’t a job for a generalist with a plunger. Our engineers are trained in professional drainage techniques, carry specialist equipment as standard, and work in compliance with current UK Water Industry regulations. View our licences and certifications to see the qualifications that back every job we do. [INSERT: NADC / WRC certification or other drainage accreditation if applicable]
No-Dig Solutions Wherever Possible
Digging up a driveway or garden to reach a pipe is expensive, disruptive, and often completely unnecessary. We use high-pressure water jetting and pipe relining techniques to clear and repair drains without excavation in the majority of cases — saving you time, money, and the headache of reinstating paving or landscaping afterwards.
Fast Response — Drainage Problems Don’t Wait
A blocked drain can go from manageable to critical in a matter of hours. That’s why we offer same-day drainage appointments and a 24/7 emergency line for situations that can’t wait. Our customers consistently rate us for speed and professionalism — read their feedback on our Reviews & Testimonials page.
For more on what makes us different, visit our Why Choose Us page.
Common Causes of Blocked Drains in London Properties
Most blockages don’t happen overnight — they build up over time. Here are the most common culprits our engineers encounter in London homes and businesses:
- Grease and fat build-up — cooking fat poured down kitchen drains cools and solidifies, gradually narrowing the pipe
- Hair and soap residue — accumulates quickly in bathroom and shower drains
- Wet wipes and non-flushables — even “flushable” wipes don’t break down and are a leading cause of sewer blockages
- Tree root intrusion — roots from nearby trees crack and grow into older clay or plastic pipes in search of moisture
- Collapsed or cracked pipes — old, corroded, or ground-shifted pipes can partially or fully collapse, restricting flow
- Silt and debris build-up — particularly in external gullies and drainage runs exposed to garden waste
If your drains are slow, smelly, or backing up, don’t wait for it to worsen. Book a drainage visit online and we’ll get to the bottom of it.
Drainage Solutions for Homes and Businesses
For homeowners and landlords, a blocked or damaged drain can quickly make a property uninhabitable. We work across London sorting drainage problems fast — whether it’s a single blocked sink or a full survey ahead of a tenancy change.
For commercial properties, blocked drains can halt operations, breach hygiene regulations, and create significant liability. Our team provides planned and reactive drainage services for offices, restaurants, retail units, and managed buildings across the city. If you manage a commercial property, our Commercial Annual Maintenance Contract can keep your drainage system in good order year-round — preventing costly emergency callouts before they happen.
Other Services You Might Need
Drainage issues often point to wider problems. If our survey reveals pipes that can’t be cleared or relined, our pipe replacement and relining service is the logical next step. If a drainage fault is masking an underlying leak, our leak detection and repair team can trace and fix it. And for situations that simply can’t wait — flooding, sewage backing up, or a complete blockage — our emergency plumbing service is available around the clock.
Drainage Services Across London
Our drainage engineers are based across the city and cover a wide area of London, including [INSERT: boroughs — e.g. Hackney, Islington, Southwark, Ealing, Wandsworth, Tower Hamlets, Lewisham] and surrounding areas. Local coverage means faster arrival times and no inflated call-out distances.
Check our service areas page to confirm we cover your postcode — or just call and we’ll confirm straight away.
Drainage Emergency? We’re on Call Right Now
Sewage backing up, drains overflowing, or a smell that tells you something’s seriously wrong? Our 24/7 emergency drainage line is staffed every day of the year. Call now and we’ll dispatch an engineer as fast as possible — before the damage spreads.
Call the Emergency Line Book a Drainage Visit
Frequently Asked Questions About Drainage Services
How do I know if my drain is blocked?
The most common signs are water draining slowly from sinks, baths, or showers; a gurgling sound from plugs or toilets after use; water pooling near an outside drain; and a persistent unpleasant odour from your drains. If you’re noticing one or more of these, it’s worth getting an engineer to look before a partial blockage becomes a complete one.
How much does drain unblocking cost in London?
The cost depends on where the blockage is, how severe it is, and the method needed to clear it. We always provide a clear, honest quote before we start — with no hidden call-out fees. For a specific price, book a visit online or give us a call and we’ll talk you through what’s involved.
Can you unblock a drain without digging?
In most cases, yes. High-pressure water jetting clears the majority of blockages without any excavation. For structural issues such as cracked or root-damaged pipes, we use pipe relining techniques wherever possible — repairing from the inside without disturbing the ground above. We always explore no-dig options first and only recommend excavation when there’s no practical alternative.
Who is responsible for blocked drains in a rented property?
Generally, landlords are responsible for maintaining drainage systems within and connected to their rental properties, while tenants are responsible for blockages caused by misuse — such as flushing non-flushable items. If you’re a landlord or letting agent, we work with both parties regularly and can advise on the right course of action. Visit our FAQ page for more answers to common drainage questions.