CLEARMASTERS
Drain clearance on large properties
Long private drains, multiple chambers and mature trees make blockages harder to find on big plots. We locate the problem with a camera, clear it with high-pressure jetting, and tell you what caused it.
Learn moreCobham and Oxshott are known for large homes on large plots, many on private roads and gated estates. Most are on mains drainage, but a big house with a long drive often has a long private drain to match, and a growing number have basements, pool plant rooms or annexes that rely on a pump to reach the sewer.
Along the River Mole and out towards Downside, Ockham and Hatchford, the picture changes. Some older houses, cottages and farms here are on septic tanks, cesspits or treatment plants. Low ground near the river can flood, and the London Clay that much of the area sits on drains slowly.
Whatever you have, one team looks after it. Our crews are in the Cobham area most days and we answer the phone 24 hours a day, 365 days a year.
Our Cobham drainage services
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Blocked Drains & CCTV Surveys
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Pump Station Servicing
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Septic Tank Surveys
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Septic Tank & Cesspit Emptying
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Treatment Plant Servicing
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Flood & Groundwater Removal
Learn moreCovering Cobham
& villages
& villages
24/7
call-outs
call-outs
Homes &
businesses
businesses
Waste transfer
notes
notes
Own tanker
fleet
fleet
What we do for Cobham customers
Private pump stations
Basements, pool plant rooms, annexes and some private estates rely on pump stations to lift waste to the sewer. We service them, test pumps, floats and alarms, and respond 24/7 when one fails.
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CCTV drain surveys and tracing
Before buying, extending or landscaping, a CCTV survey shows where your drains run and what condition they’re in. We can trace long runs and find buried chambers.
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Septic tanks and treatment plants
Out towards Downside, Ockham and Hatchford, some homes are off the mains. We empty septic tanks and cesspits and service treatment plants, checking everything while we’re there.
Learn moreLocal knowledge
Drainage around Cobham: what to know
Big homes, long drains and the River Mole.
Private roads and estates
On private estates, the drains and any shared pump station may be the residents’ responsibility. Check with your residents’ association.
Pumps below ground
Basements and plant rooms below the sewer depend on pumps. Annual servicing is far cheaper than a flood.
Near the Mole
Low ground by the river floods after heavy rain, and London Clay drains slowly. Both affect soakaways and drainage fields.
Local to you
Areas we cover in and around Cobham
We cover Cobham and the towns and villages around it.
Cobham · and neighbouring areas
- Cobham
- Oxshott
- Stoke d’Abernon
- Fairmile
- Downside
- Church Cobham
Surrounding villages · including homes on septic tanks
- Ockham
- Hatchford
- Wisley
- Effingham
- East Horsley
- West Horsley
- Hersham
- Esher
- Claygate
- Fetcham
- Byfleet
- Pyrford
Not sure if we cover you?
If you’re in or around Cobham, we cover you. Call with your postcode and we’ll confirm.
Nearby areas
Why Cobham customers use us
Discreet, careful work on larger homes
Whether it’s a basement pump in Oxshott or a septic tank near Ockham, here’s what you can expect.
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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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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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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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Paperwork done properly
A waste transfer note with every collection, and a written report after surveys and services.
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One call for everything
Tanks, treatment plants, pump stations, grease traps and drains, all handled by one team.
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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.
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
★★★★★Excellent service from start to finish. The guys turned up on time and completed the job really quickly and efficiently. Highly recommended.
Checkatrade review Checkatrade · KT24
★★★★★Great service, as ever...been using Clearmasters for 8 years now, very professional, reliable and have sorted blockages and camera inspection for problems in the past.
★★★★★Great job again from Clearmasters, Matt was very responsive and fitted us in on short notice.
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 you need. Let us know about gate codes, estate rules or anyone who should be told before we arrive.
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Step 2
We come out and do the job
We send the right van, tanker or engineer. It helps if:
- you tell us where the inspection chambers are, as long private drains are common
- gates are open or we have the code, and someone can show us the plant room or pump chamber
- cars are moved away from covers on the drive
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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 Cobham property
Tell us what you need and we’ll come back with a price. If something’s flooding or an alarm is going off, call us now.
- Free quotes for drains, pumps and tanks
- Private pump station servicing and repairs
- CCTV surveys and drain tracing
Urgent?
03333 233566
Questions answered
Cobham drainage FAQs
What homeowners and estates around Cobham ask us most.
Who looks after the drains on a private estate?
Often the residents or a residents’ association, through a management company. The water company may only be responsible from where the estate drains join the public sewer.
Our pool plant room has a pump. Do you service those?
Yes. If waste or water from a basement, plant room or annexe is pumped to the drain, we can service the pump and chamber and respond if it fails.
Can you find where our drains run?
Yes. We trace drains with a camera and locating equipment, find buried chambers and give you a plan of the route.
Do you empty septic tanks around Downside and Ockham?
Yes. Some homes and farms near Cobham are off the mains, and we empty and service their systems.
Is London Clay bad for drains?
It can be. It shrinks in dry weather and swells in wet, which can crack old clay pipes. It also drains slowly, so soakaways struggle.
Can you come out at night?
Yes. We answer the phone 24 hours a day. 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.