Industry leading domestic & commercial oil tanks
Discover Harlequin, industry leading storage and wastewater solutions
When it comes to reliability, innovation, and environmental stewardship in storage and wastewater management solutions, Harlequin stands as a beacon of excellence.
Since its inception in 1981, Harlequin has grown from a humble operation with just three employees into one of Europe's leading manufacturers of polyethylene storage tanks and wastewater treatment systems. With a steadfast commitment to quality, sustainability, and customer satisfaction, Harlequin continues to set the benchmark for the industry.
Our trusted range of Septic Tanks, Sewage Treatment Plants & Ad-Blue Storage Tanks from Harlequin
Oil Tanks
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Sewage Treatment
The latest sewage treatment solutions for domestic & commercial applications
Thermal Stores
The latest in hot water storage systems for domestic & commercial applications
Harlequin - A Proud History of Innovation
Harlequin’s journey began in Northern Ireland over four decades ago. What started as a small family-owned business has evolved into a dynamic enterprise, employing over 105 staff members at its state-of-the-art manufacturing facility in East Kirkby. Despite its growth, Harlequin remains true to its family-owned roots, fostering a culture of innovation, trust, and integrity.
From wastewater treatment systems to rainwater harvesting solutions and hot water storage tanks, Harlequin has revolutionized the storage industry, providing reliable solutions for both domestic and commercial applications.
Commitment to Quality and Environmental Responsibility
At the heart of Harlequin’s operations lies an unwavering dedication to quality and sustainability. Harlequin products are designed and manufactured to meet the highest technical and regulatory standards, ensuring durability, efficiency, and environmental friendliness.
Harlequin holds a suite of internationally recognized certifications such as ISO 900, ISO 14001 & ISO 45001.
Additionally, Harlequin is a proud member of OFTEC, NADC, and British Water, further demonstrating its commitment to maintaining industry excellence.
Industry leading product range
Harlequin offers a trusted range of septic tanks, sewage treatment plants, and AdBlue storage tanks, designed for efficiency, reliability, and environmental responsibility. Harlequin septic tanks are made from durable high-density polyethylene (HDPE), feature a two-chamber design for effective separation of solids and liquids. Available in various sizes, Harlequin cater to households and larger developments, providing versatile solutions for wastewater management.
For advanced treatment needs, Harlequin’s sewage treatment plants transform sewage into clean, non-polluting effluent using bacteria. With capacities ranging from 6-person domestic units to 50-person commercial systems, these cost-effective and low-maintenance plants comply with strict environmental regulations.
Harlequin’s AdBlue storage tanks further showcase their expertise, offering safe, efficient storage solutions to reduce diesel engine emissions. Made from AdBlue-resistant medium-density polyethylene (MDPE), these tanks are available in scalable sizes for both individual and commercial use. By choosing Harlequin AdBlue tanks, customers support cleaner air and environmental sustainability.