CLEARMASTERS
Why it matters
Drainage problems on site cost time
A flooded trench stops the groundworkers, a full welfare unit annoys the whole site, and debris in new drains can hold up handover.
Water stops work
Rain and groundwater in excavations hold up pours and put footings at risk. Fast tanker response keeps the programme moving.
Welfare that works
Regular emptying of welfare units and holding tanks, booked so nobody has to chase it.
Clean drains at handover
Concrete, mortar and silt in new drains cause blockages for the first residents. Jet and survey before handover.
Paperwork sorted
RAMS, insurance certificates, training records and a waste transfer note for every load, ready for your site file.
Interactive
What you need at each stage of the build
Choose a stage to see the drainage work that usually comes with it.
Keeping excavations dry
Rain and groundwater fill footings, trenches and basements. Our tankers take the water away so work can carry on, and we deal with contaminated water properly.
- Groundwater and flood water removal by tanker
- Clearing silt-laden water from excavations
- Disposal of oily or contaminated water
- Emergency call-outs after heavy rain
Welfare and site services
Site welfare units, holding tanks and canteen drains need regular emptying while the build goes on.
- Emptying site welfare units and portable toilets
- Holding tank emptying on a schedule
- Unblocking site drains and gullies
- Removing liquid waste with a waste transfer note every time
Drainage that’s ready to hand over
New drains collect concrete, mortar, silt and debris during the build. Jet them clean and survey them before handover or adoption.
- High-pressure jetting to clear construction debris
- CCTV surveys with written reports
- Pump station and treatment plant clean-out before handover
- Manhole and chamber clean-out
Aftercare and maintenance
Until a pump station or sewer is adopted, someone has to look after it. We can maintain it for the developer or the management company.
- Pump station servicing until adoption
- Treatment plant servicing and desludging
- Planned maintenance handed over to the management company
- A 24/7 line for residents’ emergencies
Interactive
Flooded excavation?
Get a rough idea of how much water there is, then call us for a tanker.
How much water is in that hole?
A rough guide to the volume of water in a flooded excavation, and how many tanker loads it might take.
Our tankers carry 2,000 to 4,000 gallons (about 9,000 to 18,000 litres). Groundwater can keep coming in while we pump, so real numbers vary. Call us and we’ll advise.
For an emergency, call our 24/7 line on 03333 233577.
What we offer
How we work with contractors
24/7 emergency cover
One number, answered day and night. Tankers to stop an overflow, engineers to fix the cause.
Our own tankers
Tankers from 2,000 to 4,000 gallons, all with jetting facilities. No subcontracting.
Jetting and CCTV
Planned jetting of problem drain runs before they block, and camera surveys to find the cause of repeat problems.
Compliance paperwork
RAMS, insurance certificates and training records on request, and a waste transfer note for every load removed.
Invoicing by site and PO
Invoices split by site and quoting your purchase order numbers.
A named contact
One person who knows your site, your access arrangements and your preferences.
One contractor
Everything from dewatering to drain surveys
Getting started
How it works
Tell us about the site
Location, access, the stage you’re at and what you need: one-off or regular.
Paperwork first
We send RAMS, insurance and training records for your site file.
On site
Our own crews and tankers do the work, with a waste transfer note for every load.
Through to handover
Jetting, CCTV surveys and maintenance until the drainage is handed over or adopted.
What our customers say
Checkatrade
From 134 reviews · Read them
From 63 reviews · Read them
Scores as of September 2026
Questions answered
Questions from contractors and developers
Can you pump out a flooded excavation?
Yes. We remove groundwater and flood water from footings, trenches, basements and lift pits by tanker, and dispose of it properly. If the water is contaminated with oil or fuel, we can deal with that too.
Do you empty site welfare units?
Yes. We empty welfare units, portable toilets and holding tanks on a regular schedule or as a one-off, with a waste transfer note for every load.
Can you clean new drains before handover?
Yes. We jet new drains, chambers and pump stations to remove concrete, mortar, silt and debris left from the build, and can carry out a CCTV survey afterwards.
Do new sewers need a CCTV survey before adoption?
Water companies normally ask for a CCTV survey of new sewers before they adopt them, and defects found then are much cheaper to fix than after handover. We carry out CCTV surveys and supply a written report.
Who looks after a pump station before it’s adopted?
Until a water company adopts it, the developer or the management company is usually responsible. We can service and maintain it in the meantime, and respond to alarms 24/7.
Can you supply RAMS and insurance before starting?
Yes. We can supply risk assessments and method statements (RAMS), insurance certificates and training records, including confined space entry, on request.
How big are your tankers?
Our tankers range from 2,000 to 4,000 gallons, about 9,000 to 18,000 litres, and all have jetting facilities. Tell us about access and we’ll send the right one.
Do you install treatment plants and soakaways?
Yes. Our groundworks team installs treatment plants, soakaways, manholes and inspection chambers.
Got a different question? Call 03333 233566 or send us a message.
Let’s talk about your site
Tell us where the site is, what stage you’re at and what you need. We’ll send the paperwork and get a tanker booked.
Useful guides
Other sectors we work with: Hotels · Holiday parks and campsites · Pubs and restaurants · Wedding and event venues · Golf clubs · all sectors
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.