CLEARMASTERS
Why business parks are different
Many tenants, one set of drains
On a business park, what one tenant puts down the drain can cause a problem for everyone, and the landlord or managing agent is often left to sort it out.
Oil and fuel
Workshops, yards and car parks rely on interceptors to stop oil reaching the drains and the environment.
Food units
Fat from takeaways and food production blocks shared drains.
Big paved areas
Large yards and car parks send silt and rainwater into gullies that need regular clearing.
Clear responsibility
Leases, shared drains and water company assets: knowing who’s responsible for what.
Interactive
Around the estate
Choose a type of unit to see the common problems and what we do about them.
Vehicle workshops, garages and trade units
Oil, fuel and silt from vehicles and wash bays need to be caught before they reach the drains.
- Oil interceptors emptied and inspected regularly
- Wash bay silt traps cleared
- Oily waste disposed of with a waste transfer note
Food production, takeaways and cafés
Fat and food waste from food units are a common cause of shared drain blockages.
- Grease separators emptied on a schedule
- Kitchen drain runs jetted before they block
- Tenants reminded of their responsibilities
Service yards, loading bays and car parks
Large paved areas send rainwater, silt and oil into gullies and surface water drains.
- Gullies and channel drains cleared
- Surface water interceptors emptied
- Soakaways checked
Offices and shared facilities
Toilets and kitchenettes used by many tenants, on drains shared by the whole estate.
- Planned jetting of shared drain runs
- Pump station servicing
- Fast response to blockages
Interactive
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What we offer
How we work with landlords and managing agents
Planned maintenance contracts
A schedule for every drainage asset on site, booked and confirmed by our office, with a written report after every visit.
Interceptors and oily waste
Interceptors emptied and inspected, and oily waste disposed of properly with a waste transfer note.
Jetting and CCTV
Planned jetting of problem drain runs before they block, and camera surveys to find the cause of repeat problems.
Invoicing by site and PO
Invoices split by site and quoting your purchase order numbers.
Compliance paperwork
RAMS, insurance certificates and training records on request, and a waste transfer note for every load removed.
24/7 emergency cover
One number, answered day and night. Tankers to stop an overflow, engineers to fix the cause.
One contractor
Every drainage asset on the estate
Getting started
How it works
Site visit
We walk the estate, record every drainage asset and map the shared drains.
A plan for the estate
A schedule for interceptors, gullies, jetting and servicing, with costs per site.
Visits and reports
Our own crews do the work, with a written report and waste transfer notes.
Ongoing support
Your named contact keeps it on track, and our 24/7 line covers emergencies.
What our customers say
Checkatrade
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From 63 reviews · Read them
Scores as of September 2026
Questions answered
Questions from landlords and managing agents
How often should an oil interceptor be emptied?
It depends on the size of the interceptor and how much oil and silt reaches it. Follow the manufacturer’s guidance, inspect it regularly and empty it before the oil and silt build up too far. We can set up a schedule and keep records.
Who is responsible for shared drains on a business park?
Usually the landlord or management company looks after shared drains, and tenants are responsible for what they put into them, depending on the lease. Shared drains that connect to a public sewer may belong to the water company. Our guide to who is responsible for drains explains more.
Do businesses need permission to discharge to the sewer?
Anything other than domestic sewage, such as process water or wash water, is trade effluent and usually needs consent from the water company before it goes into a public sewer.
Can you clear gullies across the whole estate?
Yes. We clear gullies, channel drains and silt traps across business and industrial estates, and can plan it before winter.
Can you find out which unit is causing blockages?
Often, yes. A CCTV survey can show where fat, silt or debris is entering the shared drain, which helps you deal with the source.
Can you invoice each estate separately?
Yes. We invoice by site and quote your purchase order numbers.
Can you supply RAMS and insurance documents?
Yes. We can supply risk assessments and method statements (RAMS), insurance certificates and training records, including confined space entry, on request.
Do you offer 24/7 cover?
Yes. Our emergency line, 03333 233577, is answered 24 hours a day, 365 days a year.
Got a different question? Call 03333 233566 or send us a message.
Let’s talk about your estate
Tell us about your estate and what’s on site. We’ll arrange a visit, map the drainage and put together a plan.
Useful guides
Other sectors we work with: Construction and developers · Hotels · Holiday parks and campsites · Pubs and restaurants · Wedding and event venues · 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.