Elson Amerpak Replacement with CUBEflow Coral Si

Elson Replacement

The ELSOflow and CUBEflow rectangular hot water tanks are like for like replacement for original Elson vented and thermal stores. McDonald Water Storage were able to manufacture and supply the perfect replacement solution.


The homeowner had an original Elson Amerpak package incorporating a Coral Si, part of a complete plumbing package, heated by a central boiler plant but incorporating the controls for both heating and hot water.

He had spent more than two months without hot water, while having plumbers inspect the unit. Having had suggestions from installers to replace the system with something completely different, possibly due to lack of knowledge on the current unit, the homeowner carried out his own internet search and found McDonald Water Storage were able to manufacture a direct replacement for the tank.


The homeowner was able to provide us with the information taken from the data badge on the original Elson unit, enabling us to manufacture the perfect replacement. This was essential due to the CUBEflow Coral Si Thermal Store not only fitting into existing space but was also sited on top of a framework with all the heating components and controls below. This meant the connections needed to be in the correct position underneath to utilise the existing pipework and provided a quick and easy installation.

As the homeowner had previously experienced trouble sourcing a qualified tradesperson with knowledge of the product, Prism Property Maintenance, a nationwide maintenance and installation company who have years of experience with thermal stores, were put in contact.

The old unit was replaced and new one installed in less than a day, and after two months the homeowner has had his mains pressure hot water restored.


“With the old Elson unit being so unique in both design and location, it was essential the replacement was not only a perfect fit but also the connections matched the original configuration. The Thermal Store manufactured by McDonald Water Storage provided a perfect solution with minimal disruption to the homeowner.”

“The unit was millimetre perfect and superb fit.”

Justin Milsom, Prism Property Maintenance

“Something I told the installer was that as a customer looking for the replacement, I found it very helpful to have actual images of the work being done it gave me more confidence to approach the company/installer.”


Register Your Product

Please enter your details below to register your product.

Product Details
Homeowner Details
Installer Details
For more information on the warranty details, click here

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

Enter your details below...

Join The Club!

Claim 10% off
mcdonald water storage
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.
To claim your offer simply enter your email address below

By Entering your email address and pressing send, you agree to be happy to receive offers and updates from McDonald Water Storage.