The new and improved THERMflow thermal store range is available NOW

Now incorporating high density foam and white cased finish as standard providing excellent heat retention
and maximising the benefits of all your homes available energy sources for both heating and hot water
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Unvented Cylinder flexibility
Unvented hot water storage solutions with the added flexibility of being standard design
or bespoke manufactured to suit your specific installation requirements
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Replacement thermal store Solutions
Our comprehensive range of thermal stores provide the perfect fit
for discontinued models of Albion Mainsflow,
Gledhill PulsaCoil and Elson Coral E/Si.

See if we have the replacement solution for you.
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HTM04-01 NHS Specification
When specifying hot water storage units for NHS installations, they must
comply with HTM04-01 document for Safe Water within Healthcare Premises.

For further information go to our dedicated page outlining the requirements.
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Need SPARE Parts and Components?

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Register your unvented product to extend warranty to 25 years.

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McDonald Water Storage

UK leading copper hot water cylinder manufacturers since 1945.

Our commitment to providing a total quality service is reflected in every aspect of our offering from the advice provided by our technical sales team through to the premium grade copper material used and our manufacturing systems and processes.

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Tried & Tested / Healthy / Efficient / Versatile / Long Lasting / Recyclable

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For more information on the warranty details, click here

Fast delivery

Our cylinders can be delivered either direct to site or to the plumber’s merchant. They are distributed either by our own fleet of transport or through a courier service.

If the products are held in stock, they can be delivered the next working day, subject to courier availability. When you place your order, advise the team regards the delivery requirements.

Quality Guarantee

All our cylinders come with a manufacturers guarantee of between 2 and 25 years, dependant on the product. Our team will be able to advise you on the warranty period at the time of purchase.

All components supplied with the cylinder come with the individual manufacturers guarantee.


We have a wealth of manufacturing and specification experience, from domestic cylinders to complex calorifiers.

Our technical team can discuss your individual cylinder requirements and advise if there is a standard solution available or if a bespoke product is required.

Here To Help

Whether you need assistance with specification of a product, technical query, placing an order or any other enquiry, our team are available to help.

The office is open Monday to Friday between 8am and 5pm.

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Installation Service Quote

Please enter your details below to request a quotation for our installation service.

Technical Assistance Form

If you require Technical Assistance from our online cylinder site, please fill in the form below.

Product Request Form

If you cannot find a product or part in our store you can request it below and we will try to source it direct for you.

Product Enquiry

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spare parts

To celebrate the launch of our online store with genuine McDonald Water Storage spares and free next day delivery (orders over £50), we want you to enjoy a 10% discount on your first order.
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