Drains, CCTV surveys and basement pumps for Finsbury Park’s converted Victorian houses, and grease traps for its restaurants.
Finsbury Park sits where Islington, Haringey and Hackney meet, around the park itself. The streets around it, in Stroud Green, Highbury and Harringay, are tall Victorian houses, most of them now split into flats, with basement or garden flats at the bottom. Blackstock Road, Seven Sisters Road and Stroud Green Road are lined with restaurants, cafés and takeaways.
Converted houses mean shared drains, and when one blocks, the lowest flat floods first. Some basement flats depend on pumps. Restaurants need grease traps emptied to keep the old drains under the busy roads flowing.
Our crews work in north London most days and we answer the phone 24 hours a day, 365 days a year.
When four or five flats share one stack and one drain, a blockage can start anywhere. We jet it clear from the external manhole, then run a camera back up the line so we can tell the freeholder which branch it came from.
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Flat sales in Stroud Green and Highbury often stall over who is responsible for the drains. A survey report gives buyers, sellers and freeholders the same facts to work from.
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Restaurants and takeaways on Blackstock Road, Seven Sisters Road and Stroud Green Road need grease traps emptied regularly. We set up a schedule and leave a waste transfer note every time.
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Basement and garden flats below the sewer rely on pumps. We service them and respond 24/7 if one fails.
Learn moreLocal knowledge
Victorian houses split into flats.
Most converted houses share one drain between flats. Your lease should say how repairs are split.
The lowest flat floods first when a shared drain blocks. If it’s below the sewer, it may rely on a pump.
Fat from restaurants and takeaways is a leading cause of blockages under the main roads.
Local to you
We cover Finsbury Park and the neighbouring parts of north London.
Finsbury Park · and neighbourhoods
Surrounding areas · homes and businesses we cover
If you’re in or around Finsbury Park, we cover you. Call with your postcode and we’ll confirm.
Why Finsbury Park customers use us
Whether it’s a blocked drain under a converted house or a restaurant grease trap, here’s what you can expect.
Emergency call-outs 24 hours a day, 365 days a year, with a real person answering the phone.
Our reports describe what we found and where, so neighbours and freeholders can agree what to do.
Tankers from 2,000 to 4,000 gallons, jet/vac combination units, CCTV survey kit and confined space teams for pump station wet wells.
We’ve been emptying tanks and servicing systems since long before most of the kit on the market existed.
SafeContractor, Achilles UVDB and RISQS approved, so we can get onto managed sites and meet your contractor checks.
Regular customers get a reminder when their next empty or service is due.
Checkatrade
From 134 reviews · Read them
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
The same simple process for every job.
Step 1
Call us or book online and tell us which flat you’re in, what’s happening and who else might be affected.
Step 2
We send the right van or tanker. It helps if:
Step 3
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
Tell us what you need and we’ll come back with a price. If something’s overflowing, call us now.
Questions answered
What flat owners, landlords and businesses around Finsbury Park ask us most.
We often can’t say whose waste it was, but we can show which branch or section it’s in, which usually settles the question.
Yes. A CCTV survey with a written report gives everyone the facts about the drains’ route and condition.
Yes. We can be booked by the freeholder, managing agent or an individual leaseholder.
Yes. We empty grease traps before opening or after closing.
It can be a sign of a partial blockage or poor venting. It’s worth having the drain checked before it blocks completely.
We’re in north London most days. Ring 03333 233566 and we’ll give you a time.
Got a different question? Call 03333 233566 or send us a message.
We're independently vetted and certified so you can trust who you're letting onto your site.
Health & safety pre-qualification accreditation, verifying our processes meet recognised safety standards.
Railway Industry Supplier Qualification Scheme — approved to work safely within the rail industry supply chain.
Utilities Vetting Database membership, confirming we meet the utilities sector's supply chain standards.
Vetted and approved under the local authority's trusted trader scheme for honesty and fair dealing.
Members of the National Association of Drainage Contractors, the UK trade body for the drainage industry.
Registered with the Environment Agency, so your waste is handled and disposed of fully within the law.
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