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
Thermal Stores
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.
2/4/2024
Understanding Septic Tanks & Sewage Treatment Plant Regulations
Have Septic Tank or Sewage Treatment Plant or planning to get a new one? Then its important you know and understand the regulations surrounding the
READ ARTICLE20/3/2024
Why are oil tanks green?
Oil Tanks the UK & Ireland are almost always green. There are over a million homes in Great Britain with oil tanks, the majority of
READ ARTICLE15/2/2024
CAP 12 Installed at a Large Country Home
Owners of a Large Country Home in Yoxall at Staffordshire needed their old septic tank to be upgraded to a sewage treatment plant that is
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