Reliance Water Controls. Reliance Water Controls Heating Expansion Vessels Reliance supply Aquasystem expansion vessels for both potable hot water systems and heating systems In the case of expansion vessels for potable hot water they are manufactured to comply with UK water regulations and are tested and certified by WRAS. All Aquasystem expansion vessels are supplied with a replaceable membrane, which separates the water and air, to prevent contamination of the water system, corrosion of the expansion vessel or pressure loss in the water system. The main purpose of an expansion vessel is to compensate for the increase in volume of water due to the varying water temperatures in hot water or heating systems. When water is heated it expands and as water is not compressible this increased volume will create a rise in pressure within the system. As an example, water being heated from 0°C-100°C will increase by approx 4.5%. The expansion vessel allows for this extra space, as when water temperature increases the membrane inside the vessel inflates to allow the water to fill the vessel. The membrane will continue to expand until the system reaches its maximum temperature. Once this has been reached the membrane will be fully inflated and takes up the capacity of the vessel shell. Gradually the temperature will drop, which will in turn decrease the volume of water. Due to the pressure from the pressurised air surrounding the membrane, water will start to exit the vessel until the membrane is deflated.
Reliance Water Controls
Reliance Water Controls Heating Expansion Vessels
Reliance supply Aquasystem expansion vessels for both potable hot water systems and heating systems
In the case of expansion vessels for potable hot water they are manufactured to comply with UK water regulations and are tested and certified by WRAS.
All Aquasystem expansion vessels are supplied with a replaceable membrane, which separates the water and air, to prevent contamination of the water system, corrosion of the expansion vessel or pressure loss in the water system.
The main purpose of an expansion vessel is to compensate for the increase in volume of water due to the varying water temperatures in hot water or heating systems. When water is heated it expands and as water is not compressible this increased volume will create a rise in pressure within the system. As an example, water being heated from 0°C-100°C will increase by approx 4.5%.
The expansion vessel allows for this extra space, as when water temperature increases the membrane inside the vessel inflates to allow the water to fill the vessel. The membrane will continue to expand until the system reaches its maximum temperature. Once this has been reached the membrane will be fully inflated and takes up the capacity of the vessel shell. Gradually the temperature will drop, which will in turn decrease the volume of water. Due to the pressure from the pressurised air surrounding the membrane, water will start to exit the vessel until the membrane is deflated.
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Reliance - Aquasystem Expansion Vessel Bracket 2, 8, 12, 18, 24 Litre
Excl. Tax: £3.96 Incl. Tax: £4.75SKU: 9803849
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Keston - Expansion Vessel Bracket
Excl. Tax: £3.96 Incl. Tax: £4.75SKU: 995604
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Warmflow Expansion Vessel Bracket - 2 - 24 Litres (3668)
Excl. Tax: £9.89 Incl. Tax: £11.87SKU: 990314
MC: 3668
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Reliance - Aquasystem Expansion Vessel Bracket 35 Litre x 2
Excl. Tax: £16.21 Incl. Tax: £19.45SKU: 9803912
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Reliance - Aquasystem 12 Litre Heating Expansion Vessel XVES100040
Excl. Tax: £21.21 Incl. Tax: £25.45SKU: 9803543
MC: XVES100040
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Reliance - Aquasystem Heating Expansion Vessel 8, 12, 18, 24, 35 Litre Sealed System & Bracket
Excl. Tax: £2.92 Incl. Tax: £3.50SKU: 9803665
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Reliance - Aquasystem 8 Litre Heating Expansion Vessel XVES100030
Excl. Tax: £22.04 Incl. Tax: £26.45SKU: 9803542
MC: XVES100030
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Reliance - EasiFit Sealed System Kit One Piece Manifold EASI209104
Excl. Tax: £23.12 Incl. Tax: £27.74SKU: 9803584
MC: EASI209104
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Reliance - Aquasystem 12 Litre Heating Expansion Vessel & Bracket XVES100040
Excl. Tax: £24.96 Incl. Tax: £29.95SKU: 9803900
MC: XVES100040
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Reliance - Aquasystem 8 Litre Heating Expansion Vessel & Bracket XVES100030
Excl. Tax: £25.79 Incl. Tax: £30.95SKU: 9803897
MC: XVES100030
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Reliance - Aquasystem 18 Litre Heating Expansion Vessel XVES100050
Excl. Tax: £26.63 Incl. Tax: £31.95SKU: 9803544
MC: XVES100050
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Reliance - Aquasystem 24 Litre Heating Expansion Vessel XVES100060
Excl. Tax: £27.88 Incl. Tax: £33.45SKU: 9803545
MC: XVES100060
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Reliance - Aquasystem 18 Litre Heating Expansion Vessel & Bracket XVES100050
Excl. Tax: £29.96 Incl. Tax: £35.95SKU: 9803903
MC: XVES100050
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Reliance - Aquasystem 24 Litre Heating Expansion Vessel & Bracket XVES100060
Excl. Tax: £31.63 Incl. Tax: £37.95SKU: 9803906
MC: XVES100060
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Reliance - Aquasystem 8 Litre Heating Expansion Vessel & Easifit Sealed System Kit VESK209050
Excl. Tax: £38.25 Incl. Tax: £45.90SKU: 9803547
MC: VESK209050
