CLEARMASTERS
Septic tanks and cesspits in the villages
We empty septic tanks and cesspits for homes, farms and stables around Brentwood, and book regular collections for cesspits that fill quickly on the clay.
Learn moreBrentwood is in Essex, just outside the M25, with a busy high street and leafy suburbs like Shenfield and Hutton. Beyond the town, the countryside is dotted with villages and hamlets, from Doddinghurst, Kelvedon Hatch and Navestock to Blackmore, Ingatestone and Mountnessing, where a large number of homes, farms and equestrian yards rely on septic tanks, cesspits and treatment plants.
Most of the area is on heavy London Clay, which drains slowly. Drainage fields struggle in winter, and many older homes use cesspits because a soakaway was never going to work. Large houses on big plots also have long private drains and, sometimes, basements and pumps.
Our crews work in Essex and east London most days and we answer the phone 24 hours a day, 365 days a year.
Our Brentwood drainage services
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Septic Tank & Cesspit Emptying
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Treatment Plant Servicing
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Treatment Plant & Pump Repairs
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Blocked Drains & CCTV Surveys
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Septic Tank Surveys
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Treatment Plant Installations
Learn moreCovering
Brentwood
Brentwood
24/7
call-outs
call-outs
Homes &
businesses
businesses
Waste transfer
notes
notes
Own tanker
fleet
fleet
What we do for Brentwood customers
Treatment plant servicing
Treatment plants are common in the villages around Brentwood. Our engineers service them at least once a year and leave a written report.
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Repairs when a plant fails
When a plant’s alarm sounds or it stops working, our engineers find the fault and fix it, carrying the most common parts.
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Drain clearance in town
We clear blocked drains in Brentwood, Shenfield and Hutton with high-pressure jetting and survey them with CCTV.
Learn moreLocal knowledge
Drainage around Brentwood: what to know
Essex villages on heavy clay.
London Clay
Clay drains slowly, so drainage fields struggle and cesspits are common.
Equestrian yards
Stables and yards often have their own tanks, which need regular emptying.
Large plots
Big homes in Shenfield and Hutton often have long private drains.
Local to you
Areas we cover in and around Brentwood
We cover Brentwood and the villages around it.
Brentwood · town and nearby
- Brentwood
- Shenfield
- Hutton
- Warley
- Pilgrims Hatch
- Ingrave
Surrounding villages · where private drainage is common
- Doddinghurst
- Kelvedon Hatch
- Navestock
- Blackmore
- Ingatestone
- Mountnessing
- Herongate
- Stondon Massey
- West Horndon
- Great Warley
- Little Warley
- Hook End
Not sure if we cover you?
If you’re in or around Brentwood, we cover you. Call with your postcode and we’ll confirm.
Why Brentwood customers use us
Experienced with Essex tanks and cesspits
Whether it’s a cesspit at a stable yard near Navestock or a treatment plant in Doddinghurst, here’s what you get.
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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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We remember so you don’t have to
Regular customers get a reminder when their next empty or service is due.
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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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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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Paperwork done properly
A waste transfer note with every collection, and a written report after surveys and services.
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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.
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
★★★★★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!
Drake I. Google review
★★★★★We've been using Clearmasters for several years now and they've been great. We're in a tricky area to get to but they always make a plan without complaint. Great team! Highly Recommended.
★★★★★Had a very good experience with Clear Masters. They provide an excellent, professional service, friendly and helpful, on time as per the agreed price
How it works
What happens when you book
Simple and the same every time.
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Step 1
Tell us what you’ve got
Call us or book online and tell us what system you have and how often it’s emptied, if you know.
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Step 2
We come out and do the job
We book a date and send the right tanker or engineer. It helps if:
- there’s firm standing for a tanker, as clay lawns and verges get soft in winter
- tank lids and covers are uncovered and easy to find
- you tell us about narrow lanes, long drives, gates or livestock
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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 Brentwood property
Tell us what you need and we’ll come back with a price. If something’s overflowing, call us now.
- Free quotes for emptying, servicing and repairs
- Septic tanks, cesspits and treatment plants
- Regular collections booked for you
Urgent?
03333 233566
Questions answered
Brentwood septic tank FAQs
What homeowners and stable owners around Brentwood ask us most.
Why are cesspits so common around Brentwood?
Much of the area is heavy London Clay, which doesn’t let water soak away. A cesspit holds everything until it’s emptied.
Can I replace my cesspit with something that needs emptying less often?
Often, a treatment plant with a permitted discharge or suitable drainage field. A survey will tell you what’s possible.
Do you empty tanks at stable yards?
Yes. We empty septic tanks and cesspits at equestrian yards, farms and homes.
How often should a treatment plant be serviced?
At least once a year.
Is Brentwood in London?
No, it’s in Essex, just outside the M25. We cover it alongside east London.
Can you help in an emergency?
Yes. Our crews work in Essex and east London most days and we answer the phone 24 hours a day. Call 03333 233566.
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.