CLEARMASTERS
repair engineers
call-outs
after every visit
and tankers
in drainage
Find your service
What needs servicing?
Pick your system to see how often it needs looking after and what we do.
- Air blower filter and diaphragms
- Diffuser and air lines
- Sludge level and effluent check
- Alarms and electrics
- Pumps and impellers
- Float switches and alarm
- Valves and rising main
- Control panel tests
- Lamps, switches and meters
- Wiring and components
- Alarm, beacon and telemetry
- Upgrades for old panels
- CCTV survey to find the fault
- No-dig lining for cracks and roots
- Excavation for collapsed pipes
- Percolation testing
- Design to BS 6297
- New and replacement fields
- Covers and frames replaced
- Chambers rebuilt and sealed
- New manholes installed
Our services
Everything we service and repair
Treatment plant servicing
Yearly servicing for every common make, from Klargester and Graf to Tricel, Marsh, Rewatec and WPL.
Pump station maintenance
Servicing, repairs and emptying for domestic and commercial pump stations, foul and surface water.
Control panels
The brains of your pump station or plant. Servicing, fault-finding, repairs and new panels.
Drain lining
No-dig repairs for cracked, leaking and root-damaged pipes.
Drain excavation and replacement
When a pipe has collapsed or needs moving, we dig it out and replace it, then put your garden back.
Drainage fields
Percolation testing, design and installation of new and replacement drainage fields.
Manhole repairs and installations
New covers and frames, rebuilt chambers and new manholes, to the right load class.
Confined space entry teams
Trained teams for safe work inside tanks, chambers and pump stations.
Why service
Why regular servicing pays for itself
Treatment plants and pump stations are hard-working machines that sit underground and out of sight, so problems often go unnoticed until something fails. By then a cheap part, like an air filter, a diaphragm or a float switch, has often turned into a burnt-out blower or a flooded chamber.
A regular service catches wear early, keeps your system working the way it was designed to and gives you a record that it’s been looked after. That matters if you sell the property, and if the Environment Agency ever asks.
Signs you need an engineer
- An alarm, beacon or warning light on
- Bad smells from the tank, chamber or drains
- A blower or pump that’s noisy, or silent
- Slow drains or toilets backing up
- Cloudy or smelly water at the outlet
On the day
What happens on a service visit
We book you in
At a time that suits you. Tell us the make and model if you know it, and we’ll come prepared.
We make it safe
Our engineer isolates the power before working on pumps, blowers or controls.
We check and service
We work through the checks for your system, clean and replace worn parts, and test everything works.
You get a report
We explain what we found, what we did and anything that needs attention, in plain English.
Why Clearmasters
Why choose Clearmasters?
With 34 years in drainage and liquid waste, there isn’t much we haven’t seen. We service, repair and empty, so one company can look after your whole system.
We also look after the drains around them, from drain lining to manhole repairs, and our confined space entry teams can work safely inside tanks and chambers.
We do this work across Surrey, West Sussex, East Sussex, Kent, Hampshire and London, with tankers and engineers in each area most days.
Ask us a questionAlways on hand
Planned servicing at a time that suits you, and 24/7 call-outs when something goes wrong.
Straight answers
We explain what we found in plain English, and give you honest advice on what needs doing now and what can wait.
Trained engineers
Our engineers hold current confined space entry certificates and work on treatment plants, pump stations and drainage every day.
One team for everything
Servicing, repairs, emptying and CCTV surveys from one company, often on the same visit.
What our customers say
Checkatrade
From 134 reviews · Read them
From 63 reviews · Read them
Scores as of September 2026
Questions answered
Repairs and servicing FAQs
How often should my treatment plant or pump station be serviced?
Most domestic treatment plants and pump stations need servicing once a year. Commercial, shared and heavily used systems usually need it every three to six months. Some manufacturers recommend more often, so we’ll follow the guidance for your system.
Do you service every make of treatment plant?
We service all the common makes, including Klargester, Graf, Tricel, Marsh, Rewatec (formerly Conder) and WPL. If yours isn’t listed, give us a call and we’ll let you know.
Can you repair faults you find during a service?
Yes. Our engineers carry most common parts, like air filters, diaphragms and float switches, so many repairs can be done there and then. Anything bigger we’ll quote for and book in.
Do you offer emergency call-outs?
Yes. We’re available 24/7, 365 days a year, for alarms, breakdowns and flooding. Call 03333 233577 out of hours.
Is servicing the same as emptying?
No. Servicing looks after the mechanical and electrical parts and checks the treatment is working. Emptying, or desludging, removes the sludge that builds up. Most systems need both, and we can arrange them together.
What areas do you cover?
Surrey, West Sussex, East Sussex, Kent, Hampshire and London.
Got a different question? Call 03333 233566 or send us a message.
Related services
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.