CUBEflow Transforms Hot Water Performance


McDonald Water Storage transformed the performance of the hot water storage solution and dramatically reduced running costs for a sheltered housing scheme in Sussex by replacing their inefficient and problematic gravity fed, combination cylinders with their high performance CUBEflow rectangular thermal stores.


The original gravity combination cylinders were installed in 1979. Heated from a central boiler plant, the pressure at the showers was improved via an additional pump, which led to pumps being left on and failing with debris getting into the shower head. Cylinders were starting to fail and client was experiencing an increase in maintenance, costs and disruption.


The site was surveyed by McDonald Water Storage team, and provided a full design showing connection layout and sizing. We manufactured and supplied CUBEflow Thermal Store units to fit into existing tight space, allowing the installers to utilise the existing pipework which minimised the installation costs and provided a quick and easy installation. Being a thermal store, it provided mains pressure hot water therefore there was no requirement for the shower pump.

The client avoided costly and problematic issues surrounding G3 and discharge pipework required with unvented cylinders. The homeowners not only benefited from the minimal disruption during the replacement process, but also had reduced running costs through improvements in efficiency and heat losses.


“The Thermal Store solution provided by McDonald Water Storage have performed excellently providing mains pressure to all hot water outlets including a thermostatic shower, and provided a seamless offering with minimal disruption. We will certainly continue to use this product on future installations where the need arises”
Frank Ling, Senior Surveyor, Housing & Care 21

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