Companies using air compressors could face fines of up to £20,000—or even imprisonment—if they fail to comply with regulations surrounding the disposal of compressed air condensate. Shockingly, many businesses remain unaware of these rules, their obligations, and the steps they can take to avoid financial and reputational damage. Non-compliance isn’t just a legal risk; it can lead to costly fines, operational downtime, and long-term harm to your company’s reputation.
The solution? Installing an oil-water separator on your compressor. This simple yet critical device separates oil from water in the condensate produced during compression, ensuring regulatory compliance and protecting the environment.
The Hidden Cost of Non-Compliance
Imagine this: A manufacturing company, unaware of its legal obligations, continues to discharge untreated condensate into the environment. Months later, it faces a £20,000 fine, a tarnished reputation, and costly equipment repairs due to oil contamination. Unfortunately, this scenario is all too common.
Condensate is a byproduct of compressed air systems, formed when airborne contaminants like oil, water, solid particles, and microorganisms are drawn into the system. If left untreated, this mixture can contaminate groundwater, harm ecosystems, and violate environmental laws.
In the UK, two key pieces of legislation govern condensate disposal:
- Water Resources Act 1991
Knowingly allowing toxic waste to enter surface or groundwater is a criminal offense, punishable by fines of £20,000 or more in a Crown Court. - Water Industry Act 1991
This act requires businesses to obtain consent from local sewerage providers before discharging treated condensate. Discharging into open water—such as rivers, streams, or storm drains—is strictly prohibited and can result in fines or imprisonment for company directors.
These laws aren’t just red tape; they’re designed to protect the environment and public health. Ignoring them can have severe consequences.
How Oil-Water Separators Work
Oil-water separators are designed to remove oil from water using physical separation methods, such as coalescing, gravity, or centrifugal filtration. These devices can eliminate up to 99.5% of oil from compressed air condensate, ensuring that only clean water is discharged.
Why Oil-Water Separation Matters
- Environmental Protection: Just one litre of oil can contaminate up to one million litres of water. Oil slicks prevent oxygen from reaching aquatic life, harm wildlife by damaging fur and feathers, and disrupt ecosystems.
- Regulatory Compliance: Oil-water separators help businesses meet strict environmental regulations, avoiding fines and legal action.
- Equipment Protection: Untreated condensate can cause corrosion and damage to compressed air systems, leading to costly repairs and downtime.
- Clean Compressed Air: Separators ensure that the air supplied to your tools and equipment is free from oil, improving performance and longevity.
-
Condensate Systems
Tanair BOW-S2500S | 2500 CFM Oil Water Separator
£1,992.00Original price was: £1,992.00.£1,892.06Current price is: £1,892.06. exc vat. Add to basket -
Condensate Systems
Tanair BOW-S1800S | 1800 CFM Oil Water Separator
£1,172.00Original price was: £1,172.00.£1,113.27Current price is: £1,113.27. exc vat. Add to basket -
Condensate Systems
Tanair BOW-S1250S | 1250 CFM Oil Water Separator
£866.00Original price was: £866.00.£822.49Current price is: £822.49. exc vat. Add to basket -
Condensate Systems
Tanair BOW-S900S | 900 CFM Oil Water Separator
£456.00Original price was: £456.00.£433.10Current price is: £433.10. exc vat. Add to basket -
Condensate Systems
Tanair BOW-S360S | 360 CFM Oil Water Separator
£301.00Original price was: £301.00.£286.37Current price is: £286.37. exc vat. Add to basket -
Condensate Systems
Tanair BOW-S120S | 120 CFM Oil Water Separator
£212.00Original price was: £212.00.£201.12Current price is: £201.12. exc vat. Add to basket -
Condensate Systems
Tanair BOW-S60S | 60 CFM Oil Water Separator
£57.00Original price was: £57.00.£55.94Current price is: £55.94. exc vat. Add to basket -
Condensate Systems
Tanair TAN2TANDEMOWS | 0 – 1500 CFM Oil Water Separator
£1,063.29 exc vat. Add to basket
The Global Perspective
While the UK has stringent regulations, similar laws exist worldwide. For example:
- In the European Union, the Water Framework Directive sets strict limits on oil discharge into water bodies.
- In the United States, the Clean Water Act regulates the discharge of pollutants, including oil, into waterways.
As environmental regulations become stricter globally, businesses that invest in compliance now will avoid higher costs and legal risks in the future.
Maintenance and Longevity
Oil-water separators are low-maintenance but require periodic replacement. Most models, like the Tanair OWS, have a working life of approximately 4,000 hours—meaning they need replacement once or twice a year, depending on usage. Regular maintenance ensures optimal performance and compliance.
A Necessity, Not an Option
Oil-water separators aren’t just a “nice-to-have”; they’re a legal and ethical necessity. While experiments show that oil and water don’t mix, simply skimming oil off the top isn’t enough. Proper separation is critical to minimising environmental impact and avoiding costly penalties.
Why Are So Many Companies Still Non-Compliant?
The answer often boils down to a lack of awareness. Management may not be familiar with the laws, assuming compliance is the responsibility of maintenance teams. Meanwhile, operators may inherit legacy systems that never included separators and see no reason to change. This gap in accountability leaves businesses vulnerable.
The Bottom Line
Failing to comply with condensate disposal regulations isn’t just a legal risk—it’s a financial and ethical one. The cost of non-compliance far outweighs the investment in an oil-water separator. By taking action now, businesses can:
- Avoid fines and legal action.
- Protect their reputation.
- Reduce equipment downtime and repair costs.
- Safeguard the environment.
The solution is straightforward, and with the right information, compliance is within reach for every business. Don’t wait until it’s too late—invest in an oil-water separator today and ensure your business operates responsibly, efficiently, and within the law.
Take Action Today: Protect Your Business and the Environment
Don’t let non-compliance put your business at risk. Investing in a high-quality oil-water separator is a simple, cost-effective way to ensure regulatory compliance, protect your equipment, and safeguard the environment.
At Tanair Compressors, we specialise in providing reliable, efficient oil-water separators designed to meet the needs of businesses across industries. Whether you operate a small workshop or a large manufacturing facility, our solutions are tailored to help you stay compliant and reduce your environmental impact.
Why Choose Tanair?
- Proven Performance: Our oil-water separators remove up to 99.5% of oil from condensate, ensuring clean, compliant discharge.
- Durability: With a working life of 4,000 hours, our separators are built to last, minimising maintenance and replacement costs.
- Expert Support: Our team is here to guide you through the process, from selecting the right separator to ensuring proper installation and maintenance.
Act Now to Avoid Costly Penalties
The clock is ticking—non-compliance could cost your business thousands in fines, reputational damage, and equipment repairs. Don’t wait until it’s too late.
👉 Visit Tanair Compressors today to explore our range of oil-water separators and find the perfect solution for your business.
Explore More of Our Articles

Work Hard, Play Harder: Versatile Portable Air Compressors for Every Need
The Power of Portable Air – Beyond the Garage Portable air compressors are often thought of simply as tools for inflating tyres. However, their true

A Comparative Analysis of Oil-Water Separator Technologies: Choosing the Right Solution for Your Business
At Compressed Air Systems UK, we know that compressed air is the lifeblood of countless industries across the UK. But with compressed air comes condensate—a

Why Oil-Water Separators Are Vital: Avoid Fines & Stay Compliant
Companies using air compressors could face fines of up to £20,000—or even imprisonment—if they fail to comply with regulations surrounding the disposal of compressed air

The Importance of Service Contracts & 24/7 Support
The Importance of Service Contracts and 24/7 Support in Preventing Air Compressor Failures If your business uses an air compressor, it is essential to keep
Enhancing Energy Efficiency with ESOS Phase 4 and Compressed Air Systems UK
Energy Efficiency Solutions with ESOS Phase 4 and Tanair Compressors As the UK continues to strive towards its Net Zero by 2050 target, energy efficiency

Unlocking Energy Efficiency with ESOS Phase 4
Unlock Energy Efficiency with ESOS Phase 4 The Energy Savings Opportunity Scheme (ESOS) is a mandatory energy assessment scheme designed to promote energy efficiency among