Oil Tanks
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
Hot Water Systems
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.
5/12/2022
Last Order Dates & Christmas Closures
It’s that time of the year again. With the holiday season fast approaching we’d like to make sure you place your orders in time for
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19/8/2022
Harlequin rolls out its first Large Commercial Treatment Plant
We are thrilled to announce that our first large commercial treatment plant proudly made its way out of our facility in East Kirkby. This 100
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8/4/2022
Why is HVO so special?
It’s an ideal renewable fuel for your boiler For over 50 years heating oil has been a popular choice of fuel for heating homes off
READ ARTICLEWhat our customers say
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When our septic tank failed, Harlequin were recommended to me. Mark McElroy did a site visit and recommended a Hydroclear 6 and pump station for our home. During the ordering, delivery and installation process all my questions and queries were answered by Mark in a prompt, professional and friendly manner. I found the products excellent and easy to install. I would highly recommend Harlequin.
Chris McAfee
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As a pleased Harlequin supplier, 24-7 Plumbing & Heating can only give a 5 star review, the service given is second to none, with amazing delivery and customer relations. We receive amazing support from our Product manager Jon Jones who always solves a problem or query in one call. Fantastic company with a fantastic dependable range of products.
Rachel Wiltshire
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I just wanted to let you know what a great customer service experience we had from Dan Berry today who covers our area. We had one of your treatment plants installed and weren’t convinced it was operating as it should. Dan reassured me on the phone, visited as soon as he was able and sorted the problem. He is super knowledgeable and a credit to your organisation. Customer service as it should be.
Katrina
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Great company always willing to help us out. Prompt deliveries and our RSM Scott Lorraine is always available on the phone to assist in any way he can.
Chris Vertigan
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Excellent pricing & service, we are always kept up to date with delivery schedules by the sales team. I would highly recommend Harlequin.
Dan McGowan
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Fantastic Products from a Great Team! As a distributer of Harlequin products we have the pleasure of dealing with these guys on a regular basis & have never had anything other than a first-class service.
Colin Green
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Top top top customer service from this company – Aaron M to be exact 🙂 Great cylinders.
Olivia Clay
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I decided to give HeatStream Electric a go after Scott Lorraine recommended it. I am mighty pleased with the product as, with it, I am able to provide my family with plenty of mains pressure hot water. I was able to upgrade from my old vented low pressure system to the HeatStream Electric quite easily. It does away with all the problems of a traditional unvented cylinder. Would highly recommend.
Steve Love, City Plumbing