CLEARMASTERS
Blocked drains in houses and mansion blocks
We clear blocked drains with high-pressure jetting and trace which flat or section is causing the problem, so managing agents and residents know who needs to act.
Learn moreStreatham stretches along one of south London’s longest high streets, lined with restaurants, takeaways and shops, with streets of Victorian and Edwardian houses, inter-war semis and Art Deco mansion blocks behind it. It’s all on mains drainage, so our work here is mostly drains, surveys and grease traps.
Mansion blocks and converted houses share drains between many flats, and when one blocks, everyone notices. Mature trees on Streatham Common and the avenues around it send roots into old clay pipes. Some lower-ground flats depend on pumps.
Streatham is one of the closest parts of London to our office in Smallfield. Our crews work in south London most days and we answer the phone 24 hours a day.
Our Streatham drainage services
View all services
Blocked Drains & CCTV Surveys
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Septic Tank Surveys
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Grease Traps & Commercial Waste
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Pump Station Servicing
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Treatment Plant & Pump Repairs
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Gullies & Interceptors
Learn moreCovering
Streatham
Streatham
24/7
call-outs
call-outs
Homes &
businesses
businesses
Waste transfer
notes
notes
Own tanker
fleet
fleet
What we do for Streatham customers
CCTV surveys and root problems
Roots from mature trees are a common cause of repeat blockages here. A CCTV survey shows exactly where they’re getting in and whether the pipe needs repair or lining.
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Grease traps for the high street
Restaurants and takeaways along Streatham High Road need grease traps emptied regularly. We set up a schedule and leave a waste transfer note every time.
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Lower-ground and basement pumps
If a flat or basement is below sewer level, it relies on a pump. We service them and respond 24/7 when one fails.
Learn moreLocal knowledge
Drainage in Streatham: what to know
Mansion blocks, mature trees and a long high street.
Mansion blocks
Shared drains in mansion blocks serve many flats. Regular jetting and a survey help managing agents plan.
Mature trees
Roots from street and common trees often find their way into old clay drains.
Close to us
Streatham is one of the nearest parts of London to our Smallfield office.
Local to you
Areas we cover in and around Streatham
We cover Streatham and the neighbouring parts of south London.
Streatham · and neighbourhoods
- Streatham
- Streatham Hill
- Streatham Common
- Streatham Vale
- Norbury
- Furzedown
Surrounding areas · homes and businesses we cover
- Tooting
- Balham
- Brixton
- West Norwood
- Thornton Heath
- Mitcham
- Clapham
- Herne Hill
- Tulse Hill
- Upper Norwood
- Colliers Wood
- Croydon
Not sure if we cover you?
If you’re in or around Streatham, we cover you. Call with your postcode and we’ll confirm.
Why Streatham customers use us
Local to south London
Whether it’s a shared drain in a mansion block or a grease trap on the High Road, here’s what you can expect.
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Day and night, all year
Emergency call-outs 24 hours a day, 365 days a year, with a real person answering the phone.
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34 years in drainage
We’ve been emptying tanks and servicing systems since long before most of the kit on the market existed.
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Paperwork done properly
A waste transfer note with every collection, and a written report after surveys and services.
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The right kit for the job
Tankers from 2,000 to 4,000 gallons, jet/vac combination units, CCTV survey kit and confined space teams for pump station wet wells.
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Trained engineers
Our engineers and most of our tanker drivers hold current confined space entry certificates, and the engineers carry the most common parts.
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We remember so you don’t have to
Regular customers get a reminder when their next empty or service is due.
What our customers say
9.84/10
Checkatrade
From 134 reviews · Read them
4.9/5
From 63 reviews · Read them
Scores as of September 2026
★★★★★Very professional operation. Super clean tanker. Responded quickly to quote and booking requests. Arrived on time. Kept us notified throughout. Very pleasant and helpful guy operating the equipment. Gave sound advice with ongoing maintenance tips. Will definitely be saving Clearmasters' contact details to use them again.
Angie B. Google review
★★★★★Clearmasters have emptied our Septic Tank for many years. It is not an easy placed tank to get to but the chaps manage perfectly. I find them very efficient, friendly and polite. Thank you Valerie Wise
★★★★★So glad we found them. The team was professional, courteous and helpful. They came the next day and pricing is way more competitive than a national chain. Will be using them again in a year's time to service the pump. Thanks again!
How it works
What happens when you book
The same simple process for every job.
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Step 1
Tell us what you’ve got
Call us or book online and tell us what’s happening. Managing agents: tell us about access and which flats are affected.
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Step 2
We come out and do the job
We send the right van or tanker. It helps if:
- manhole covers are clear of cars, bins and planters
- there’s somewhere nearby for our van or tanker to park
- you tell us about shared drains or neighbours who are affected
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Step 3
Paperwork and the next visit
You get a waste transfer note for anything we take away, and a written report after a survey or service. If it’s a regular job, we’ll remind you when the next one is due.
Free, no-obligation quote
Get a quote for your Streatham property
Tell us what you need and we’ll come back with a price. If something’s overflowing, call us now.
- Free quotes for drains, surveys and pumps
- Reports for managing agents
- Grease traps for the high street
Urgent?
03333 233566
Questions answered
Streatham drainage FAQs
What homeowners, managing agents and businesses in Streatham ask us most.
Our mansion block’s drain keeps blocking. What can we do?
We’ll clear it and survey the drain to find the cause. A regular jetting schedule often prevents repeat blockages in shared drains.
Can tree roots really block a drain?
Yes. Roots get in through cracks and joints, then grow and catch everything that flows past.
Do you empty grease traps on Streatham High Road?
Yes, for restaurants, cafés and takeaways.
Who is responsible for a drain shared with neighbours?
Shared drains are usually the water company’s. We can find the blockage and tell you whose section it’s in.
How close are you to Streatham?
Our office is in Smallfield, and Streatham is one of the nearest parts of London to us. Our crews are in south London most days.
Can you come out today?
Call 03333 233566 and we’ll tell you when we can be there.
Got a different question? Call 03333 233566 or send us a message.
Fully accredited & compliant
We're independently vetted and certified so you can trust who you're letting onto your site.
SafeContractor
Health & safety pre-qualification accreditation, verifying our processes meet recognised safety standards.
RISQS
Railway Industry Supplier Qualification Scheme — approved to work safely within the rail industry supply chain.
Achilles UVDB
Utilities Vetting Database membership, confirming we meet the utilities sector's supply chain standards.
Trading Standards Approved
Vetted and approved under the local authority's trusted trader scheme for honesty and fair dealing.
NADC Member
Members of the National Association of Drainage Contractors, the UK trade body for the drainage industry.
Registered Waste Carrier
Registered with the Environment Agency, so your waste is handled and disposed of fully within the law.