About Us

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. Exceptional customer service is at heart of Harlequin’s business; supplying quality products within a trusted and professional service. The company has a number of internationally recognised management system certifications including ISO 9001, 14001 and 45001. Harlequin is a member of OFTEC and British Water.