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EXPANSION VESSELS FOR HEATING SYSTEMS

EXPANSION VESSELS FOR HEATING SYSTEMS

Expansion Vessels for Heating Systems

Expansion vessels are an essential component in sealed heating systems, designed to absorb the expansion of water as it heats and prevent excessive pressure within the system. By accommodating changes in water volume, expansion vessels help maintain stable system pressure and protect boilers, heat pumps, pipework, and other heating components from damage caused by pressure fluctuations.

In modern central heating systems, expansion vessels are commonly used in conjunction with boilers, heat pumps, buffer tanks, and other hydraulic components. They ensure that pressure remains within safe operating limits while allowing the system to expand and contract as temperatures change during normal operation.

At B.E.E. – The SMART Heating Merchant, we supply a range of high-quality expansion vessels suitable for domestic and commercial heating systems. Our selection includes reliable vessels designed for long service life, consistent pressure control, and dependable performance in sealed heating systems.

Common Applications for Expansion Vessels

Expansion vessels are commonly used in heating systems for:

• Sealed central heating systems
• Boiler heating systems
• Heat pump installations
• Systems with buffer tanks or hydraulic separation
• Maintaining stable pressure in closed heating circuits

Choosing the Right Expansion Vessel

Selecting the correct expansion vessel depends on factors such as system water volume, operating pressure, and maximum system temperature. Proper sizing ensures the vessel can safely accommodate water expansion while maintaining stable system pressure during heating cycles.

If you are unsure which expansion vessel is suitable for your system, our team can assist with selecting the correct vessel for your installation.

Related Products

Expansion vessels are often used as part of wider sealed heating and hot water systems. For compatible hot water storage options, you may also be interested in our hot water cylinders.

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Zilmet CAL-PRO 3/4" BSP Heating Expansion Vessel With Bracket 4L to 24L

Zilmet UK
£0.00 Ex-VAT - £0.00 Ex-VAT
£0.00 Ex-VAT
£30.63 Ex-VAT - £41.57 Ex-VAT
£30.63 Ex-VAT - £41.57 Ex-VAT
£30.63 Ex-VAT

Zilmet CAL-PRO Heating Expansion Vessel With Bracket 4L to 24L The Zilmet CAL-PRO heating expansion vessel with bracket is designed for use in seal...

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Zilmet CAL-PRO 3/4" BSP Heating Expansion Vessel 35L to 400L

Zilmet UK
£0.00 Ex-VAT - £0.00 Ex-VAT
£0.00 Ex-VAT
£72.24 Ex-VAT - £490.54 Ex-VAT
£72.24 Ex-VAT - £490.54 Ex-VAT
£72.24 Ex-VAT

Zilmet CAL-PRO 3/4" BSP Heating Expansion Vessel 35L to 400L The Zilmet CAL-PRO heating expansion vessel is designed for use in sealed heating syst...

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Zilmet CAL-PRO 1" BSP Heating Expansion Vessel 500L to 900L

Zilmet UK
£0.00 Ex-VAT - £0.00 Ex-VAT
£0.00 Ex-VAT
£616.33 Ex-VAT - £2,428.58 Ex-VAT
£616.33 Ex-VAT - £2,428.58 Ex-VAT
£616.33 Ex-VAT

Zilmet CAL-PRO 1" BSP Heating Expansion Vessel 500L to 900L The Zilmet CAL-PRO heating expansion vessel is designed for use in sealed heating syste...

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Airfix P DHW exp.ves. 2/2,7[10bar]

Flamco
£54.78 Ex-VAT
£54.78 Ex-VAT - £54.78 Ex-VAT
£54.78 Ex-VAT
£38.34 Ex-VAT
£38.34 Ex-VAT - £38.34 Ex-VAT
£38.34 Ex-VAT

Potable water expansion vessels for use in domestic and commercial sealed chilled and hot water systems. Nitrogen gas filling for longer retention ...

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Flexcon Solar exp.ves. 1000/3,0 [10bar]

Flamco
£3,149.26 Ex-VAT
£3,149.26 Ex-VAT - £3,149.26 Ex-VAT
£3,149.26 Ex-VAT
£2,204.47 Ex-VAT
£2,204.47 Ex-VAT - £2,204.47 Ex-VAT
£2,204.47 Ex-VAT

Expansion vessels specially designed for solar powered installations (acc. to EN12828). The best expansion vessels thanks to our groundbreaking te...

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Flexcon Solar exp.ves. 425/3,0 [10bar]

Flamco
£1,774.97 Ex-VAT
£1,774.97 Ex-VAT - £1,774.97 Ex-VAT
£1,774.97 Ex-VAT
£1,242.47 Ex-VAT
£1,242.47 Ex-VAT - £1,242.47 Ex-VAT
£1,242.47 Ex-VAT

Expansion vessels specially designed for solar powered installations (acc. to EN12828). The best expansion vessels thanks to our groundbreaking te...

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Flexcon Solar exp.ves. 300/3,0 [10bar]

Flamco
£1,251.61 Ex-VAT
£1,251.61 Ex-VAT - £1,251.61 Ex-VAT
£1,251.61 Ex-VAT
£876.12 Ex-VAT
£876.12 Ex-VAT - £876.12 Ex-VAT
£876.12 Ex-VAT

Expansion vessels specially designed for solar powered installations (acc. to EN12828). The best expansion vessels thanks to our groundbreaking te...

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Flexcon Solar exp.ves. 200/3,0 [10bar]

Flamco
£1,116.85 Ex-VAT
£1,116.85 Ex-VAT - £1,116.85 Ex-VAT
£1,116.85 Ex-VAT
£781.79 Ex-VAT
£781.79 Ex-VAT - £781.79 Ex-VAT
£781.79 Ex-VAT

Expansion vessels specially designed for solar powered installations (acc. to EN12828). The best expansion vessels thanks to our groundbreaking te...

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Flexcon Solar exp.ves. 140/3,0 [10bar]

Flamco
£864.59 Ex-VAT
£864.59 Ex-VAT - £864.59 Ex-VAT
£864.59 Ex-VAT
£605.21 Ex-VAT
£605.21 Ex-VAT - £605.21 Ex-VAT
£605.21 Ex-VAT

Expansion vessels specially designed for solar powered installations (acc. to EN12828). The best expansion vessels thanks to our groundbreaking te...

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Flexcon Solar exp.ves. 110/3,0 [10bar]

Flamco
£849.15 Ex-VAT
£849.15 Ex-VAT - £849.15 Ex-VAT
£849.15 Ex-VAT
£594.40 Ex-VAT
£594.40 Ex-VAT - £594.40 Ex-VAT
£594.40 Ex-VAT

Expansion vessels specially designed for solar powered installations (acc. to EN12828). The best expansion vessels thanks to our groundbreaking te...

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Flexcon Solar exp.ves. 50/2,5 [8bar]

Flamco
£210.83 Ex-VAT
£210.83 Ex-VAT - £210.83 Ex-VAT
£210.83 Ex-VAT
£147.58 Ex-VAT
£147.58 Ex-VAT - £147.58 Ex-VAT
£147.58 Ex-VAT

Expansion vessels specially designed for solar powered installations (acc. to EN12828). The best expansion vessels thanks to our groundbreaking te...

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Flexcon Solar exp.ves. 35/2,5 [8bar]

Flamco
£168.54 Ex-VAT
£168.54 Ex-VAT - £168.54 Ex-VAT
£168.54 Ex-VAT
£117.98 Ex-VAT
£117.98 Ex-VAT - £117.98 Ex-VAT
£117.98 Ex-VAT

Expansion vessels specially designed for solar powered installations (acc. to EN12828). The best expansion vessels thanks to our groundbreaking te...

View full details

Flexcon Solar exp.ves. 25/2,5 [8bar]

Flamco
£135.52 Ex-VAT
£135.52 Ex-VAT - £135.52 Ex-VAT
£135.52 Ex-VAT
£94.87 Ex-VAT
£94.87 Ex-VAT - £94.87 Ex-VAT
£94.87 Ex-VAT

Expansion vessels specially designed for solar powered installations (acc. to EN12828). The best expansion vessels thanks to our groundbreaking te...

View full details

Flexcon Solar exp.ves. 18/2,5 [8bar]

Flamco
£117.59 Ex-VAT
£117.59 Ex-VAT - £117.59 Ex-VAT
£117.59 Ex-VAT
£82.31 Ex-VAT
£82.31 Ex-VAT - £82.31 Ex-VAT
£82.31 Ex-VAT

Expansion vessels specially designed for solar powered installations (acc. to EN12828). The best expansion vessels thanks to our groundbreaking te...

View full details

Flexcon Solar exp.ves. 12/2,5 [8bar]

Flamco
£103.89 Ex-VAT
£103.89 Ex-VAT - £103.89 Ex-VAT
£103.89 Ex-VAT
£72.72 Ex-VAT
£72.72 Ex-VAT - £72.72 Ex-VAT
£72.72 Ex-VAT

Expansion vessels specially designed for solar powered installations (acc. to EN12828). The best expansion vessels thanks to our groundbreaking te...

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Flexcon M exp. vessel 2800/6.0 [10 bar]

Flamco
£1,612.06 Ex-VAT - £35,793.09 Ex-VAT
£1,612.06 Ex-VAT - £35,793.09 Ex-VAT
£1,612.06 Ex-VAT
£1,128.44 Ex-VAT - £25,055.01 Ex-VAT
£1,128.44 Ex-VAT - £25,055.01 Ex-VAT
£1,128.44 Ex-VAT

Read More - Flexcon M - Expansion Vessels | Flamco (aalberts-hfc.com) Expansion vessels with a replaceable bladder for use in sealed heating instal...

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Flexcon M exp. vessel 2800/3.0 [6 bar]

Flamco
£1,557.96 Ex-VAT - £16,227.67 Ex-VAT
£1,557.96 Ex-VAT - £16,227.67 Ex-VAT
£1,557.96 Ex-VAT
£1,090.57 Ex-VAT - £11,359.30 Ex-VAT
£1,090.57 Ex-VAT - £11,359.30 Ex-VAT
£1,090.57 Ex-VAT

Read More - Flexcon M - Expansion Vessels | Flamco Expansion vessels with a replaceable bladder for use in sealed heating installations (acc. to EN...

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Flexcon Premium 35/0,5 [6bar]

Flamco
£82.85 Ex-VAT - £459.65 Ex-VAT
£82.85 Ex-VAT - £459.65 Ex-VAT
£82.85 Ex-VAT
£22.47 Ex-VAT - £109.40 Ex-VAT
£22.47 Ex-VAT - £109.40 Ex-VAT
£22.47 Ex-VAT

Read More - Flexcon Premium 2 - 80 [6 bar] - Expansion Vessels | Flamco For sealed heating installations (acc. to EN12828) and chilled water (cooli...

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Flexcon exp. vessel 1000/1,5 [6bar]

Flamco
£486.36 Ex-VAT - £2,835.24 Ex-VAT
£486.36 Ex-VAT - £2,835.24 Ex-VAT
£486.36 Ex-VAT
£340.45 Ex-VAT - £1,984.66 Ex-VAT
£340.45 Ex-VAT - £1,984.66 Ex-VAT
£340.45 Ex-VAT

Read more - Flexcon 110 - 1000 [6 bar] - Expansion Vessels | Flamco For sealed heating installations (acc. to EN12828) and chilled water (cooling) ...

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Potable Expansion Vessel – 2L to 50L

JOULE

Airfix P DHW exp.ves. 500/3,5[10bar]

Flamco
£54.78 Ex-VAT - £1,756.87 Ex-VAT
£54.78 Ex-VAT - £1,756.87 Ex-VAT
£54.78 Ex-VAT
£38.34 Ex-VAT - £1,229.80 Ex-VAT
£38.34 Ex-VAT - £1,229.80 Ex-VAT
£38.34 Ex-VAT

Potable water expansion vessels for use in domestic and commercial sealed chilled and hot water systems.Nitrogen gas filling for longer retention o...

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Zilmet SOLAR-PLUS 12 Litre to 600 Litre Expansion Vessel for Solar Systems

Zilmet UK

Description The SOLAR-PLUS is a membrane expansion vessel manufactured according to the PED 97/23 EC and EN 13831 standards, suitable for solar sys...

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