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Unvented hot water cylinders

Gledhill Hot Water Cylinders

Unvented hot water cylinders

Mains pressure hot water from an unvented cylinder

Index Page > Hot Water Cylinders > Unvented Water cylinders


Higher performance hot water supply with a mains pressure hot water system.

Gone are the days of poor domestic hot water pressure so typical of household gravity hot water systems. Provided your incoming mains cold water is supplied at an adequate pressure you can now obtain the same performance from your hot water that you previously only enjoyed from the cold tap.

Mains pressure hot water can be achieved by utilising either an unvented cylinder or a thermal store. This section focuses on unvented cylinders. For more information on the function of a thermal store please click here.

Before you consider any mains pressure system you should familiarise yourself with how they work. You should also realise that they are only as good as the incoming mains pressure. If yours is poor or of a variable nature this may not be the way to go. Mains pressure systems may not have pumps added to them to improve performance. Indeed, if you have pumps attached to your present gravity system you will need to remove them upon conversion. Having said that, if your mains pressure is good it will outperform many booster pumps so you will gain performance without the need for a noisy pump that will inevitably break down at some point.

There are considerations to factor into your choice of system. Unvented cylinders must be installed correctly and will require periodic service checks to insure that pressure relief equipment is working safely. They will however change your perception of the dreary old hot water cylinder. Please don't hesitate to call for advice.

Unvented hot water cylinders

It is common to find unvented cylinders made from stainless steel. There is a single basic reason for this - cost! Stainless steel is cheaper than copper and by capitalising on it's higher tensile strength a thinner sheet of stainless steel can be used than if the cylinder were to be made from copper. Unvented cylinders can however be made from copper (a preferred material for water storage) they just cost more.

Choose from the following range of unvented cylinders brought to you at astonishing prices!



Stainless Lite



Stainless Lite



Stainless Lite

Slimline Direct


Stainless Lite

Slimline Indirect

Heatrae Sadia


Direct & Indirect

Stainless Lite slimline direct unvented hot water cylinder

Indirect Stainless Lite slimline unvented cylinder

Heatrae Sadia MEGAFLO unvented hot water cylinder

Unvented cylinders heated electrically

Unvented cylinders with boiler coil

Super slim electrically heated unvented

Super slim with boiler coil

Megaflo unvented cylinder range


Gledhill Horizontal Unvented Cylinders


Copper Unvented horizontal water cylinders





Gledhill Stainless Lite UNVENTED Horizontal cylinder


Unvented Horizontal Cylinders built to your own specifications

Gledhill Stainless Lite PLUS - Heat Pump Cylinder



Gledhill Stainless Lite HORIZONTAL unvented Horizontal Copper cylinders built to your design

Unvented Stainless Lite HP (Heat Pump)





Unvented solar cylinders

Unvented hot water cylinders are also available with a solar coil to enable a wet solar system to contribute energy to heating hot water. Unvented solar cylinders can be Direct or Indirect.



Maybe you would prefer to read about one of these

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Stainless steel vented hot water cylinders

Copper vented hot water cylinders

Copper Unvented hot water cylinders

Unvented Buffer stores

Bespoke unvented stainless and copper cylinders

Stainless steel hot water cylinders

Built to your own specifications

Buffer Stores for use with heat pumps

Vented cylinders made from Stainless Steel

Traditional vented copper hot water cylinders

Copper cylinders built to withstand mains pressure

Increase heat pump system volume

Unique service now available for stainless cylinders

Articles that may be of interest

  • Cylinder materials - stainless vs copper









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