• Harlequin Manufacturing

    Leading manufacturer of innovative polyethylene storage tanks and systems

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  • EASY & SAFE Diesel & AdBlue Storage on site

    Best suited for Farms & Agribusinesses

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  • ULTIMATE OIL TANK APP FOR INSTALLERS

    Purchase Oil Tanks & Register Product Warranty

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  • INTRODUCING Large Sewage Treatment Plants

    For Commercial Applications with population of 51-600

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  • FUTUREPROOF Diesel Storage

    HVO Compatible Tanks for Diesel Storage

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  • FUTUREPROOF Oil Storage

    HVO Compatible Tanks for Home Heating

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  • SAFE & SECURE Diesel Storage

    RED → WHITE

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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.

Bunded Oil Tanks Uncovered: An Essential Guide
21/6/2024

Bunded Oil Tanks Uncovered: An Essential Guide

This guide contains crucial information about bunded oil tanks, including their design, functionality, and the various models available in the market. Whether you’re considering the

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Domestic Sewage Treatment Plants: Your Questions Answered
15/6/2024

Domestic Sewage Treatment Plants: Your Questions Answered

Understanding and managing domestic sewage treatment plants can be complicated. These systems, essential for treating wastewater from homes and small-scale commercial environments, are pivotal to

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HVO Boilers best bet for rural homes
13/6/2024

HVO Boilers best bet for rural homes

According to recently released 2021 Census information the East of England remains the most popular area for oil heating systems, almost 200,000 oil heating systems

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Septic Tanks vs Sewage Treatment Plants; Finding the Right Solution for your Needs
10/6/2024

Septic Tanks vs Sewage Treatment Plants; Finding the Right Solution for your Needs

When it comes to managing domestic wastewater, homeowners often face the dilemma of choosing between a septic tank and a sewage treatment plant. Both systems

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HVO – An Effective Heating Solution for Older Buildings
22/5/2024

HVO – An Effective Heating Solution for Older Buildings

Did you know that there over a million homes heating with oil fired heating in Great Britain, most of these, around 900,000 are to be

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Harlequin launches Portable Diesel / AdBlue Tank range
2/5/2024

Harlequin launches Portable Diesel / AdBlue Tank range

We have now expanded our range of Commercial Fuel and AdBlue storage tanks to include a range of Portable Tanks equipped to provide safe &

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What our customers say

  • Brilliant service all round, have dealt with Frank Cox quite a few times now for various tank installs and every time has been handled professionally. All queries answered with nothing feeling like it was hard work. 100% definitely recommend!

    Star Star Star Star Star

    Harvee Wicklen, Wicklen Ltd

  • We distribute the complete range of Harlequin tanks and have always very pleased with the quality of the products and service provided. Their aftersales and technical support is excellent and always willing to help.

    Star Star Star Star Star

    Rolf Jackson, Tanks-UK

  • We have been dealing with Harlequin on wastewater treatment tanks for quite some time. Their customer service is exceptional, staff is friendly and their sewage treatment tanks are ultra reliable. In our professional opinion, this is the Rolls Royce of treatment plants at a reasonable cost. If your needing a tank of any kind then look no further.

    Star Star Star Star Star

    John Kilpatrick, MD, Dynamic Tank Solutions

  • 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.

    Star Star Star Star Star

    Chris McAfee

  • 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 area sales manager Jon Jones who always solves a problem or query in one call. Fantastic company with a fantastic dependable range of products.

    Star Star Star Star Star

    Rachel Wiltshire, 24-7 Plumbing & Heating

  • 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.

    Star Star Star Star Star

    Katrina

  • Great company always willing to help us out. Prompt deliveries and our area sales manager Scott Lorraine is always available on the phone to assist in any way he can.

    Star Star Star Star Star

    Chris Vertigan

  • Excellent pricing & service, we are always kept up to date with delivery schedules by the sales team. I would highly recommend Harlequin.

    Star Star Star Star Star

    Dan McGowan

  • 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.

    Star Star Star Star Star

    Colin Green, Director, Drainwise

  • Top top top customer service from this company – Aaron M to be exact 🙂 Great cylinders.

    Star Star Star Star Star

    Olivia Clay

  • 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.

    Star Star Star Star Star

    Steve Love, City Plumbing

  • Manufacturers who always deliver top quality products. My customers expect the best and that’s what I can deliver with Harlequin moulding the Rolltack. They apply high quality to everything they make. Great products and staff!

    Star Star Star Star Star

    Clare Medland, MD, Rolltack

  • Fantastic product, great service provided from admin staff, rep to deliveries. Fully recommend Harlequin Oil Storage Tanks.

    Star Star Star Star Star

    Darren Tilley, Director, Oil Tank Replacements

  • A brilliant supplier of fuel tanks. Used for years and always professional and helpful.

    Star Star Star Star Star

    Jayne Whittaker, Suffolk Oil Solutions

  • Fantastic product. Excellent service.

    Star Star Star Star Star

    Adrian Bhreathnach, ASP Oil Tank Services

  • Great company who were very sensitive to personal circumstances.

    Star Star Star Star Star

    Sophie Van Heygen

  • Good quality tanks at competitive prices plus fast efficient service too.

    Star Star Star Star Star

    Robert Potts

  • The best service a customer can expect from a customer service.

    Star Star Star Star Star

    Joni Sukumaran

  • Pleased with the HeatStream, a very good product saves fitting expansion vessel but still provides mains pressure delivery.

    Star Star Star Star Star

    Peter Hedges

  • Great product excellent service fantastic support from sales team and a massive thank you to Jon Jones helped us out on several occasions

    Star Star Star Star Star

    Keith Davies

  • Lincs Oil Tanks has been installing Harlequin tanks for the last few months, and is now our main supplier. They have a great range of tanks, great service and the tanks are good quality.

    Star Star Star Star Star

    Lincs Oil Tanks

  • Great Tanks and customer service. Their area sales manager Jon Jones here in Wales has always been on hand when advice is needed which makes Harlequin my first tank option on installs.

    Star Star Star Star Star

    Oil Heating Gwynedd

  • I would like to thank Dan Berry and his engineer, Roger for the service they provided in rectifying a problem with our harlequin hydro clear sewage treatment plant, both individually are a credit to harlequin the manufacturers

    Star Star Star Star Star

    Jobensfield Retrievers

  • We have been working with Harlequin for a few years now and it’s been effortless to deal with them. Mike Pitcher has really looked after us since the start and always kept us up to date with information and orders. Many thanks.

    Star Star Star Star Star

    Vale Oils

  • I needed help with a broken part on an old Harlequin tank. Fantastic support from Caoimh Donnelly of Customer services who advised what to do. Short response time to my Email showing photo of item and immediate resolution. I wish all Customer Support people could be as good. Delighted. Happy to share this excellent support experience.

    Star Star Star Star Star

    Michael Mullan

  • On reaching out to my trusted heating merchant for his recommendation, he didn’t hesitate to thrust the Harlequin leaflet into my hand. Good enough for me, I thought, and this 2500ITE install is the result. A high standard of manufacturing quality control was evident, and my customer service experience with them is up there with the best. Good work Harlequin.

    Star Star Star Star Star

    Gary Marshalsey