Drain Unblocking
Available 24/7. We clear blocked drains, sinks, toilets and gullies on the first visit in the vast majority of cases.
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Blocked & Damaged Downpipe Repairs London
Fast blocked downpipe repairs in London & Herts. We fix leaks, clear blockages & replace damaged uPVC or cast iron downpipes. Fixed price, no call-out fee.
Is a blocked or broken downpipe causing water to overflow and damage your walls? Get expert help today.
24/7 Downpipe Repair & Unblocking Services in London & Hertfordshire
We provide expert CCTV drain surveys and inspections for homes and businesses, using advanced camera technology to diagnose any issue without excavation. Ready to Get a Clear Answer? Don’t just book a survey—book a solution. If you need an honest assessment and a clear plan of action for your drains, talk to our expert team today.
Your Local Surveyors in London & Hertfordshire
You can rely on our teams for fast, professional drain surveys across the region. We have dedicated engineers serving: All London Boroughs (including North, South, East & West London) Hertfordshire (including Watford, St Albans, Hemel Hempstead, Stevenage, and surrounding areas)
Testimonial
Drain 247 mapping saved our project from delays. Clear plans, fast service!”
— John S, Architect, London
Frequently Asked Questions
We offer competitive fixed-price rates for most downpipe repairs and unblocking jobs. We will always provide a full quote for you to approve before any work begins.
The most common causes are a build-up of leaves, moss, and twigs washed from the roof. Silt, debris, and sometimes even bird nests or tennis balls can also cause major blockages.
Yes. Where possible, we can repair cracks and joints on cast iron systems. If the corrosion is too severe, we can provide a no-obligation quote to replace a section or the entire pipe with a modern, durable equivalent.
Regular gutter cleaning is the best form of prevention. We also recommend installing gutter guards or leaf filters, which stop the bulk of debris from ever entering the downpipe.
Our engineers are equipped to handle that too. If clearing the downpipe doesn't solve the issue, we can use our CCTV drain cameras to inspect the underground gully and pipework and provide a quote for clearing that blockage as well.
Why It Is Worth Doing Properly
Water Stains on Walls
Dark, damp patches or streaks running down your exterior walls below the gutter line.
Cracked or Broken Pipes
Visible cracks, splits, or disconnected sections in the downpipe.
Pooling Water
Water collecting at the base of your property near the downpipe outlet.
Gurgling Sounds
Noises from the pipe indicate trapped air and a partial blockage.
Interior Damp
Unexplained damp or mould appearing on internal walls can be caused by water penetration from a faulty downpipe.
Downpipe Unblocking & Cleaning
Using specialist tools and high-pressure water jetting, we can blast through any obstruction caused by leaves, moss, twigs, debris, or even tennis balls to restore full flow.
If This Sounds Like Your Problem
You do not need to diagnose it perfectly. Describe the symptom and we will tell you the likely cause and what it will cost to put right.
What Our Customers Say
An absolute pleasure to deal with. George arrived at my house quickly to take care of a blockage in my drain. He cleared it in less than an hour and was very knowledgeable.
I really needed someone to come and unblock my outside drain as it was causing flooding issues. I found these guys online and they came the same day. Very impressed.
Drain 247’s mapping saved our project from delays. Clear plans, fast service.
Drainage Services We Provide Nearby
CCTV Drain Survey
High-resolution inspections that identify structural problems, repeated blockages and hidden defects — with a report you can act on.
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Drain Repair
Patch lining, full relining and excavation repairs for cracked, collapsed or deteriorated pipework.
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Drain Mapping
Accurate mapping of underground drainage for planning applications, extensions and compliance checks.
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Drain Jetting
High-pressure water jetting that scours fat, silt and scale from the pipe wall.
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Tanker Services
Vacuum tanker deployment for emptying, interceptors, and jobs too large for a van-mounted unit.
Find out moreAreas We Cover
Same-day drainage work across Hertfordshire and north west London.
Ready to Get This Sorted?
Call for a fixed price, or leave your details and we will call you back. The phone is answered 24 hours a day.
Download the Drain 247 Brochure
The 2026 company brochure: the services, the area we cover, and how a visit works. Handy to send on to an architect, a builder or a buyer.