Heating Expansion Vessels

(160 products)

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  1. Flamco Flamcomat FG Vessel - 1200Ltr

    17717

    Flamco - 1200 Ltr - Flamcomat FG Vessel - 3 bar

    Purpose-built for EN 12828 heating and chilled-water systems, this multifunction sealed-system unit combines automatic expansion control, pressurisation, deaeration and make-up in a single package.

    A pressure-step degassing process—using a controlled pressure drop and patented PALL-ring media—removes dissolved gases even at equilibrium. A replaceable butyl bladder stores the expansion fluid at atmospheric pressure. Supplied with Flexvent Super, height-adjustable feet and a weight-capacity sensor.

    • All-in-one functionality — expansion, pressurisation, deaeration and make-up
    • Pressure-step deaeration with PALL-ring technology
    • Replaceable butyl bladder — easy maintenance and long service life
    • Delivered complete — Flexvent Super, adjustable feet, weight-capacity sensor

    Designed for commercial, industrial and residential sealed LPHW/CHW installations requiring efficient air removal and stable operating pressures.

    £29,596.15 £24,663.46
    In Stock In stock
    Delivery Icon Free Standard Delivery
  2. Flamco Flamcomat FG Vessel - 1600Ltr

    17718

    Flamco - 1600 Ltr - Flamcomat FG Vessel - 3 bar

    Purpose-built for EN 12828 heating and chilled-water systems, this multifunction sealed-system unit combines automatic expansion control, pressurisation, deaeration and make-up in a single package.

    A pressure-step degassing process—using a controlled pressure drop and patented PALL-ring media—removes dissolved gases even at equilibrium. A replaceable butyl bladder stores the expansion fluid at atmospheric pressure. Supplied with Flexvent Super, height-adjustable feet and a weight-capacity sensor.

    • All-in-one functionality — expansion, pressurisation, deaeration and make-up
    • Pressure-step deaeration with PALL-ring technology
    • Replaceable butyl bladder — easy maintenance and long service life
    • Delivered complete — Flexvent Super, adjustable feet, weight-capacity sensor

    Designed for commercial, industrial and residential sealed LPHW/CHW installations requiring efficient air removal and stable operating pressures.

    £29,044.58 £24,203.82
    In Stock In stock
    Delivery Icon Free Standard Delivery
  3. Flamco Flamcomat FG Vessel - 2000Ltr

    17719

    Flamco - 2000 Ltr - Flamcomat FG Vessel - 3 bar

    Purpose-built for EN 12828 heating and chilled-water systems, this multifunction sealed-system unit combines automatic expansion control, pressurisation, deaeration and make-up in a single package.

    A pressure-step degassing process—using a controlled pressure drop and patented PALL-ring media—removes dissolved gases even at equilibrium. A replaceable butyl bladder stores the expansion fluid at atmospheric pressure. Supplied with Flexvent Super, height-adjustable feet and a weight-capacity sensor.

    • All-in-one functionality — expansion, pressurisation, deaeration and make-up
    • Pressure-step deaeration with PALL-ring technology
    • Replaceable butyl bladder — easy maintenance and long service life
    • Delivered complete — Flexvent Super, adjustable feet, weight-capacity sensor

    Designed for commercial, industrial and residential sealed LPHW/CHW installations requiring efficient air removal and stable operating pressures.

    £29,046.24 £24,205.20
    In Stock In stock
    Delivery Icon Free Standard Delivery
  4. Flamco Flamcomat FG Vessel - 2800Ltr

    17720

    Flamco - 2800 Ltr - Flamcomat FG Vessel - 3 bar

    Purpose-built for EN 12828 heating and chilled-water systems, this multifunction sealed-system unit combines automatic expansion control, pressurisation, deaeration and make-up in a single package.

    A pressure-step degassing process—using a controlled pressure drop and patented PALL-ring media—removes dissolved gases even at equilibrium. A replaceable butyl bladder stores the expansion fluid at atmospheric pressure. Supplied with Flexvent Super, height-adjustable feet and a weight-capacity sensor.

    • All-in-one functionality — expansion, pressurisation, deaeration and make-up
    • Pressure-step deaeration with PALL-ring technology
    • Replaceable butyl bladder — easy maintenance and long service life
    • Delivered complete — Flexvent Super, adjustable feet, weight-capacity sensor

    Designed for commercial, industrial and residential sealed LPHW/CHW installations requiring efficient air removal and stable operating pressures.

    £29,047.87 £24,206.56
    In Stock In stock
    Delivery Icon Free Standard Delivery
  5. Flamco Flamcomat FG Vessel - 3500Ltr

    17721

    Flamco - 3500 Ltr - Flamcomat FG Vessel - 3 bar

    Purpose-built for EN 12828 heating and chilled-water systems, this multifunction sealed-system unit combines automatic expansion control, pressurisation, deaeration and make-up in a single package.

    A pressure-step degassing process—using a controlled pressure drop and patented PALL-ring media—removes dissolved gases even at equilibrium. A replaceable butyl bladder stores the expansion fluid at atmospheric pressure. Supplied with Flexvent Super, height-adjustable feet and a weight-capacity sensor.

    • All-in-one functionality — expansion, pressurisation, deaeration and make-up
    • Pressure-step deaeration with PALL-ring technology
    • Replaceable butyl bladder — easy maintenance and long service life
    • Delivered complete — Flexvent Super, adjustable feet, weight-capacity sensor

    Designed for commercial, industrial and residential sealed LPHW/CHW installations requiring efficient air removal and stable operating pressures.

    £29,049.53 £24,207.94
    In Stock In stock
    Delivery Icon Free Standard Delivery
  6. Flamco Flamcomat FG Vessel - 5000Ltr

    17722

    Flamco - 5000 Ltr - Flamcomat FG Vessel - 3 bar

    Purpose-built for EN 12828 heating and chilled-water systems, this multifunction sealed-system unit combines automatic expansion control, pressurisation, deaeration and make-up in a single package.

    A pressure-step degassing process—using a controlled pressure drop and patented PALL-ring media—removes dissolved gases even at equilibrium. A replaceable butyl bladder stores the expansion fluid at atmospheric pressure. Supplied with Flexvent Super, height-adjustable feet and a weight-capacity sensor.

    • All-in-one functionality — expansion, pressurisation, deaeration and make-up
    • Pressure-step deaeration with PALL-ring technology
    • Replaceable butyl bladder — easy maintenance and long service life
    • Delivered complete — Flexvent Super, adjustable feet, weight-capacity sensor

    Designed for commercial, industrial and residential sealed LPHW/CHW installations requiring efficient air removal and stable operating pressures.

    £29,604.49 £24,670.41
    In Stock In stock
    Delivery Icon Free Standard Delivery
  7. Flamco Flamcomat FG Vessel - 6500Ltr

    17723

    Flamco - 6500 Ltr - Flamcomat FG Vessel - 3 bar

    Purpose-built for EN 12828 heating and chilled-water systems, this multifunction sealed-system unit combines automatic expansion control, pressurisation, deaeration and make-up in a single package.

    A pressure-step degassing process—using a controlled pressure drop and patented PALL-ring media—removes dissolved gases even at equilibrium. A replaceable butyl bladder stores the expansion fluid at atmospheric pressure. Supplied with Flexvent Super, height-adjustable feet and a weight-capacity sensor.

    • All-in-one functionality — expansion, pressurisation, deaeration and make-up
    • Pressure-step deaeration with PALL-ring technology
    • Replaceable butyl bladder — easy maintenance and long service life
    • Delivered complete — Flexvent Super, adjustable feet, weight-capacity sensor

    Designed for commercial, industrial and residential sealed LPHW/CHW installations requiring efficient air removal and stable operating pressures.

    £29,606.17 £24,671.81
    In Stock In stock
    Delivery Icon Free Standard Delivery
  8. Flamco Flamcomat FG Vessel - 8000Ltr

    17724

    Flamco - 8000 Ltr - Flamcomat FG Vessel - 3 bar

    Purpose-built for EN 12828 heating and chilled-water systems, this multifunction sealed-system unit combines automatic expansion control, pressurisation, deaeration and make-up in a single package.

    A pressure-step degassing process—using a controlled pressure drop and patented PALL-ring media—removes dissolved gases even at equilibrium. A replaceable butyl bladder stores the expansion fluid at atmospheric pressure. Supplied with Flexvent Super, height-adjustable feet and a weight-capacity sensor.

    • All-in-one functionality — expansion, pressurisation, deaeration and make-up
    • Pressure-step deaeration with PALL-ring technology
    • Replaceable butyl bladder — easy maintenance and long service life
    • Delivered complete — Flexvent Super, adjustable feet, weight-capacity sensor

    Designed for commercial, industrial and residential sealed LPHW/CHW installations requiring efficient air removal and stable operating pressures.

    £29,607.85 £24,673.21
    In Stock In stock
    Delivery Icon Free Standard Delivery
  9. Flamco Flamcomat FG Vessel - 10000Ltr

    17725

    Flamco - Flamcomat FG Vessel - 10000Ltr - 3 bar

    Purpose-built for EN 12828 heating and chilled-water systems, this multifunction sealed-system unit combines automatic expansion control, pressurisation, deaeration and make-up in a single package.

    A pressure-step degassing process—using a controlled pressure drop and patented PALL-ring media—removes dissolved gases even at equilibrium. A replaceable butyl bladder stores the expansion fluid at atmospheric pressure. Supplied with Flexvent Super, height-adjustable feet and a weight-capacity sensor.

    • All-in-one functionality — expansion, pressurisation, deaeration and make-up
    • Pressure-step deaeration with PALL-ring technology
    • Replaceable butyl bladder — easy maintenance and long service life
    • Delivered complete — Flexvent Super, adjustable feet, weight-capacity sensor

    Designed for commercial, industrial and residential sealed LPHW/CHW installations requiring efficient air removal and stable operating pressures.

    £29,609.51 £24,674.59
    In Stock In stock
    Delivery Icon Free Standard Delivery
  10. Flamco Flamcomat FB Aux. Vessel - 200Ltr

    17830

    Flamco - 200 Ltr - Flamcomat FB Aux. Vessel

    Engineered for EN 12828 heating and chilled-water systems, Flamcomat FB Auxiliary Vessels provide additional, pressureless expansion capacity to stabilise sealed system pressures.

    Used alongside the Flamcomat FG module, the FB vessel stores expansion fluid at atmospheric pressure inside a replaceable butyl bladder. The wider Flamcomat system employs a pressure-step degassing method with patented PALL-ring media for effective dissolved gas removal. Supplied with Flexvent Super and height-adjustable feet.

    • Pressureless auxiliary vessel — increases system expansion volume
    • Replaceable butyl bladder for easy maintenance
    • Atmospheric storage of expansion fluid inside the bladder

    Suitable for systems with a maximum operating temperature of 120 °C (note: additional requirements may apply above 110 °C). Bladder maximum temperature 70 °C.

    £29,784.91 £24,820.76
    In Stock In stock
    Delivery Icon Free Standard Delivery
  11. Flamco Flamcomat FB Aux. Vessel - 300Ltr

    17831

    Flamco - 300 Ltr - Flamcomat FB Aux. Vessel

    Engineered for EN 12828 heating and chilled-water systems, Flamcomat FB Auxiliary Vessels provide additional, pressureless expansion capacity to stabilise sealed system pressures.

    Used alongside the Flamcomat FG module, the FB vessel stores expansion fluid at atmospheric pressure inside a replaceable butyl bladder. The wider Flamcomat system employs a pressure-step degassing method with patented PALL-ring media for effective dissolved gas removal. Supplied with Flexvent Super and height-adjustable feet.

    • Pressureless auxiliary vessel — increases system expansion volume
    • Replaceable butyl bladder for easy maintenance
    • Atmospheric storage of expansion fluid inside the bladder

    Suitable for systems with a maximum operating temperature of 120 °C (note: additional requirements may apply above 110 °C). Bladder maximum temperature 70 °C.

    £29,786.60 £24,822.17
    In Stock In stock
    Delivery Icon Free Standard Delivery
  12. Flamco Flamcomat FB Aux. Vessel - 400Ltr

    17832

    Flamco - 400 Ltr - Flamcomat FB Aux. Vessel

    Engineered for EN 12828 heating and chilled-water systems, Flamcomat FB Auxiliary Vessels provide additional, pressureless expansion capacity to stabilise sealed system pressures.

    Used alongside the Flamcomat FG module, the FB vessel stores expansion fluid at atmospheric pressure inside a replaceable butyl bladder. The wider Flamcomat system employs a pressure-step degassing method with patented PALL-ring media for effective dissolved gas removal. Supplied with Flexvent Super and height-adjustable feet.

    • Pressureless auxiliary vessel — increases system expansion volume
    • Replaceable butyl bladder for easy maintenance
    • Atmospheric storage of expansion fluid inside the bladder

    Suitable for systems with a maximum operating temperature of 120 °C (note: additional requirements may apply above 110 °C). Bladder maximum temperature 70 °C.

    £29,788.27 £24,823.56
    In Stock In stock
    Delivery Icon Free Standard Delivery
  13. Flamco Flamcomat FB Aux. Vessel - 500Ltr

    17833

    Flamco - 500 Ltr - Flamcomat FB Aux. Vessel

    Engineered for EN 12828 heating and chilled-water systems, Flamcomat FB Auxiliary Vessels provide additional, pressureless expansion capacity to stabilise sealed system pressures.

    Used alongside the Flamcomat FG module, the FB vessel stores expansion fluid at atmospheric pressure inside a replaceable butyl bladder. The wider Flamcomat system employs a pressure-step degassing method with patented PALL-ring media for effective dissolved gas removal. Supplied with Flexvent Super and height-adjustable feet.

    • Pressureless auxiliary vessel — increases system expansion volume
    • Replaceable butyl bladder for easy maintenance
    • Atmospheric storage of expansion fluid inside the bladder

    Suitable for systems with a maximum operating temperature of 120 °C (note: additional requirements may apply above 110 °C). Bladder maximum temperature 70 °C.

    £29,789.93 £24,824.94
    In Stock In stock
    Delivery Icon Free Standard Delivery
  14. Flamco Flamcomat FB Aux. Vessel - 600Ltr

    17834

    Flamco - 600 Ltr - Flamcomat FB Aux. Vessel

    Engineered for EN 12828 heating and chilled-water systems, Flamcomat FB Auxiliary Vessels provide additional, pressureless expansion capacity to stabilise sealed system pressures.

    Used alongside the Flamcomat FG module, the FB vessel stores expansion fluid at atmospheric pressure inside a replaceable butyl bladder. The wider Flamcomat system employs a pressure-step degassing method with patented PALL-ring media for effective dissolved gas removal. Supplied with Flexvent Super and height-adjustable feet.

    • Pressureless auxiliary vessel — increases system expansion volume
    • Replaceable butyl bladder for easy maintenance
    • Atmospheric storage of expansion fluid inside the bladder

    Suitable for systems with a maximum operating temperature of 120 °C (note: additional requirements may apply above 110 °C). Bladder maximum temperature 70 °C.

    £29,791.61 £24,826.34
    In Stock In stock
    Delivery Icon Free Standard Delivery
  15. Flamco Flamcomat FB Aux. Vessel - 800Ltr

    17835

    Flamco - 800 Ltr - Flamcomat FB Aux. Vessel

    Engineered for EN 12828 heating and chilled-water systems, Flamcomat FB Auxiliary Vessels provide additional, pressureless expansion capacity to stabilise sealed system pressures.

    Used alongside the Flamcomat FG module, the FB vessel stores expansion fluid at atmospheric pressure inside a replaceable butyl bladder. The wider Flamcomat system employs a pressure-step degassing method with patented PALL-ring media for effective dissolved gas removal. Supplied with Flexvent Super and height-adjustable feet.

    • Pressureless auxiliary vessel — increases system expansion volume
    • Replaceable butyl bladder for easy maintenance
    • Atmospheric storage of expansion fluid inside the bladder

    Suitable for systems with a maximum operating temperature of 120 °C (note: additional requirements may apply above 110 °C). Bladder maximum temperature 70 °C.

    £29,793.29 £24,827.74
    In Stock In stock
    Delivery Icon Free Standard Delivery
  16. Flamco Flamcomat FB Aux. Vessel - 1000Ltr

    17836

    Flamco - 1000 Ltr - Flamcomat FB Aux. Vessel

    Engineered for EN 12828 heating and chilled-water systems, Flamcomat FB Auxiliary Vessels provide additional, pressureless expansion capacity to stabilise sealed system pressures.

    Used alongside the Flamcomat FG module, the FB vessel stores expansion fluid at atmospheric pressure inside a replaceable butyl bladder. The wider Flamcomat system employs a pressure-step degassing method with patented PALL-ring media for effective dissolved gas removal. Supplied with Flexvent Super and height-adjustable feet.

    • Pressureless auxiliary vessel — increases system expansion volume
    • Replaceable butyl bladder for easy maintenance
    • Atmospheric storage of expansion fluid inside the bladder

    Suitable for systems with a maximum operating temperature of 120 °C (note: additional requirements may apply above 110 °C). Bladder maximum temperature 70 °C.

    £29,238.02 £24,365.02
    In Stock In stock
    Delivery Icon Free Standard Delivery
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Heating Expansion Vessels

Heating Expansion Vessels

Heating expansion vessels are a key part of any sealed heating system. As water heats up, it naturally expands. Without a vessel in place, that increase in pressure could damage boilers, pumps, or pipework. An expansion vessel safely absorbs the excessive pressure, keeping the system balanced and protected.

 

By reducing pressure spikes and stress on components, heating expansion vessels help extend the life of your equipment and keep heating systems working reliably day after day. Available in a range of sizes and specifications, they’re designed to suit everything from small domestic systems to larger commercial applications.

 

At Pumpify, you’ll find a range of heating expansion vessels from big-name brands such as Lowara, Zilmet, Reflex, and Flamco. In most cases, they're relatively small. You may even have one in your home or office already! We make it simple to choose the right one and keep your setup running as it should.