For 24/7 emergency callouts call: 0800 246 5347.
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Commercial tanker services

Fast waste removal for cesspits, septic tanks, and grease traps.
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Same-day and next-day tanker availability
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Grease trap emptying for restaurants and food businesses
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Septic tank and cesspit emptying for rural commercial sites
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Trusted by homeowners & businesses across the UK

Burger King NHS England Waitrose Franco Manca Nestlé Buxton
Why businesses choose OneFlow
No callout fees
You only pay for the tanker service itself. We don't charge extra for site visits or quotes. Straightforward pricing whether it's a one-off or regular service.
Fixed pricing
We quote a fixed price based on your tank size and waste type. No surprises when the tanker arrives, no extras added to the invoice afterwards.
Same-day availability
Tank full and causing problems? We can often get a tanker to you the same day. Our local fleet means faster response when you need waste removed urgently.
Full documentation
Every collection comes with proper waste transfer documentation. Ready for your compliance records, environmental audits, or landlord reporting.
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Most tanks emptied in under an hour
On site, emptied, and documented - with minimal disruption.
98%
Of customers would recommend us.
6000+
Jobs completed last year alone.
Why property managers trust us
Commercial properties off mains drainage need reliable tanker services. Overflowing tanks cause health hazards, business closures, and environmental incidents.
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Scheduled emptying
We'll set up a regular emptying schedule based on your tank size and usage. Never worry about remembering to book - we'll contact you when it's due.
Multi-site coordination
Managing several properties with tanks or grease traps? One point of contact, consistent service, and consolidated invoicing across all your sites.

Why choose a local team?

See how we compare to the big brands.
The big names
What you often get with the big names.
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Book weeks in advance or pay emergency premiums
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Four-hour arrival windows that waste your day
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Driver can't answer questions about your system
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Chase them for waste transfer notes
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OneFlow
What you get when you call us.
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Same-day availability for urgent jobs
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Precise arrival times that respect your schedule
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Local team who know tanks and can advise on issues
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Documentation provided on the day, every time
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Drainer of the
year 2025
The Drainage Awards
What our customers say
Real reviews from real customers.
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“Called at 6am with sewage coming up through the shower. Engineer arrived before 8, fixed it within the hour. Can't thank them enough.”
— James T, Southampton
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“Third company I'd tried that week. The other two never showed. OneFlow answered, turned up same day, and actually fixed it. Should have called them first.”
— Michelle R, Brighton
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“No messing about. Showed me the camera footage, explained what was wrong, gave me a price, and got on with it. Exactly how it should be.”
— David H, Portsmouth
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“Blocked drain on Christmas Eve. Thought we'd be stuck for days. They came out that evening and sorted it. Absolute lifesavers.”
— Sarah K, Guildford
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“We've used them for three rental properties now. Always answer the phone, always turn up, always fair on price. Hard to find.”
— Mark L, Bournemouth
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“Engineer was honest and said we didn't need half the work another company had quoted for. Saved us hundreds. We'll use them every time now.”
— Karen W, Winchester
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“Toilet blocked on the morning of our daughter's birthday party. They had someone here within the hour and sorted it before the guests arrived.”
— Rachel M, Crawley
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“Other companies quoted over the phone then doubled it on arrival. OneFlow quoted £180, charged £180.”
— Tom S, Bournemouth
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“Drainage issue had been misdiagnosed twice by other firms. OneFlow found the real problem in ten minutes with their camera. Fixed the same day.”
— Angela D, Eastbourne
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“Rang at 11pm expecting to leave a voicemail. Actual person answered. Engineer here by midnight. Didn't think companies like this still existed.”
— Chris B, Woking
FAQs
How much does commercial tank emptying cost?
How often should grease traps be emptied?
How often should septic tanks be emptied?
Can you empty tanks at short notice?
What areas do you cover for tanker services?
Do you provide waste transfer notes?
Can you empty tanks outside business hours?
What's the difference between a septic tank and a cesspit?
Can you set up a regular emptying schedule?
What if you find a problem with my tank?
Still have questions?
Get in touch with our friendly support team.
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Need a tank emptied?
24/7 callouts. No callout fees.
📞 Get a callback
60-minute average response across the UK.
★★★★★ based on 180+ Google reviews