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Unvented Mains Pressure Cylinders

Known for superb longevity and durability, stainless steel is the material of choice for modern hot water cylinders. We list unvented hot water cylinders from all the big brands including ACV, Telford, RM Cylinders, Ariston, Heatrae Sadia and more.

The most common type of unvented cylinder is indirectly heated by a boiler, with direct models heated by immersions. Solar models have the addition of a solar coil. Often commonly called a Megaflo, most unvented stainless steel cylinders contain the same parts as the Heatrae Sadia model, but are available at a far better price. We advise customers not to pay over the odds for their hot water cylinder!


Bathroom Suites
Ariston ST100 Wall Hung Unvented Stainless Steel Cylinder, Direct, 100 Litres
£347.17 RRP: £718.80
SAVE 52%
Ariston Classico STI210HE Unvented Glass Lined Steel Cylinder, Indirect, 210 Litres
£469.26 RRP: £1,000.80
SAVE 53%
Ariston Classico STD210HE Unvented Glass Lined Steel Cylinder, Direct, 210 Litres
£389.75 RRP: £817.20
SAVE 52%
Ariston Classico STD150HE Unvented Glass Lined Steel Cylinder, Direct, 150 Litres
£362.75 RRP: £754.80
SAVE 52%
Ariston Classico STD125HE Unvented Glass Lined Steel Cylinder, Direct, 125 Litres
£351.83 RRP: £729.60
SAVE 52%
Ariston Classico STI300HE Unvented Glass Lined Steel Cylinder, Indirect, 300 Litres
£534.17 RRP: £1,150.80
SAVE 54%
Telford Tempest INDIRECT Unvented Stainless Steel Hot Water Cylinder 250 LITRE
£523.50 RRP: £882.91
SAVE 41%
Telford Tempest INDIRECT Unvented Stainless Steel Hot Water Cylinder 300 LITRE
£643.73 RRP: £911.09
SAVE 29%
Ariston Aquabravo ITD150 Unvented Stainless Steel Cylinder, Direct, 150 Litres
£418.34 RRP: £883.20
SAVE 53%
Telford Tempest INDIRECT Unvented Stainless Steel Hot Water Cylinder 200 LITRE
£572.07 RRP: £901.20
SAVE 37%
Warmflow INDIRECT Unvented Stainless Steel Hot Water Cylinder 210 LITRE
£519.98 RRP: £753.60
SAVE 31%
Ariston Aquabravo ITD130 Unvented Stainless Steel Cylinder, Direct, 130 Litres
£400.14 RRP: £841.20
SAVE 52%
Telford Tempest DIRECT Unvented Stainless Steel Hot Water Cylinder 150 LITRE
£443.99 RRP: £733.20
SAVE 39%
Ariston Aquabravo ITI150 Unvented Stainless Steel Cylinder, Indirect, 150 Litres
£495.22 RRP: £1,060.80
SAVE 53%
Telford Tempest INDIRECT Unvented Stainless Steel Hot Water Cylinder 150 LITRE
£514.55 RRP: £829.20
SAVE 38%
Ariston Aquabravo ITI215 Unvented Stainless Steel Cylinder, Indirect, 215 Litres
£559.62 RRP: £1,209.60
SAVE 54%
Telford Tempest DIRECT Unvented Stainless Steel Hot Water Cylinder 125 LITRE
£429.83 RRP: £714.00
SAVE 40%
Ariston Aquabravo ITD215 Unvented Stainless Steel Cylinder, Direct, 215 Litres
£470.80 RRP: £1,004.40
SAVE 53%
Telford Tempest DIRECT Unvented Stainless Steel Hot Water Cylinder 300 LITRE
£576.42 RRP: £877.20
SAVE 34%
Warmflow DIRECT Unvented Stainless Steel Hot Water Cylinder 120 LITRE
£407.38 RRP: £590.40
SAVE 31%
Telford Tempest Solar Twin Coil Unvented INDIRECT Stainless Steel Hot Water Cylinder 200 LITRES
£627.00 RRP: £1,350.40
SAVE 54%
Telford Tempest DIRECT Unvented Stainless Steel Hot Water Cylinder 200 LITRE
£489.59 RRP: £781.20
SAVE 37%
Ariston Aquabravo ITI255 Unvented Stainless Steel Cylinder, Indirect, 255 Litres
£590.28 RRP: £1,280.40
SAVE 54%
Ariston Classico STD300HE Unvented Glass Lined Steel Cylinder, Direct, 300 Litres
£485.88 RRP: £1,039.20
SAVE 53%
Ariston Classico STI125HE Unvented Glass Lined Steel Cylinder, Indirect, 125 Litres
£415.24 RRP: £876.00
SAVE 53%
Ariston Aquabravo ITI305 Unvented Stainless Steel Cylinder, Indirect, 305 Litres
£649.39 RRP: £1,410.00
SAVE 54%
Telford Tempest Solar Twin Coil Unvented INDIRECT Stainless Steel Hot Water Cylinder 300 LITRES
£702.00 RRP: £1,652.95
SAVE 58%
Telford Tempest Solar Twin Coil Unvented INDIRECT Stainless Steel Hot Water Cylinder 170 LITRES
£604.50 RRP: £1,289.89
SAVE 53%
Telford Tempest Solar Twin Coil Unvented INDIRECT Stainless Steel Hot Water Cylinder 250 LITRES
£672.00 RRP: £1,531.92
SAVE 56%
Telford Unvented Horizontal DIRECT Stainless Steel Hot Water Cylinder 250 LITRE
£747.14 RRP: £1,719.60
SAVE 57%
Heatrae Sadia Megaflo Eco 210DD Unvented Stainless Steel Cylinder, Direct, 210 Litres
£939.47 RRP: £1,307.88
SAVE 28%
Telford Tempest INDIRECT Unvented Stainless Steel Hot Water Cylinder 125 LITRE
£508.77 RRP: £805.20
SAVE 37%
Telford Unvented Horizontal DIRECT Stainless Steel Hot Water Cylinder 300 LITRE
£801.42 RRP: £1,795.92
SAVE 55%
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