Wastewater Treatment Systems
Cost effective, super quiet effluent sewage treatment solutions for the treatment of domestic wastewater
Durable & Stable domestic and commercial heating oil tanks to suit all spaces.
Hot Water Systems
Designed specifically for flats and apartments!
The latest addition to our range of innovative storage tanks & systems.
Where customers have been at the heart of our business for 35 years
Harlequin is a leading manufacturer of innovative polyethylene storage tanks and systems. Headquartered in Northern Ireland, UK, it has a 35-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.