Durable & Stable domestic and commercial heating oil tanks to suit all spaces.
Sewage Treatment Plants
Modern sewage treatment plants designed to suit the needs of our environment
Commercial Sewage Treatment Plants
Large Sewage Treatment Plants tailor made for commercial applications
Contemporary thermal stores for storage of Hot Water
Where customers have been at the heart of our business for 40 years
Harlequin is a leading manufacturer of innovative polyethylene storage tanks and systems. Headquartered in Northern Ireland, UK, it has a 40-year heritage and exports to over 20 countries internationally. Harlequin Manufacturing has developed a diverse and innovative product range and is one of the fastest growing manufacturing companies in Northern Ireland with over 90 employees.