Heating Expansion Vessels

(160 products)

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  1. Reflex N Closed Heating & Cooling System Pressure Vessel - 100Ltr

    REFLEX-8216300

    Reflex - N100 Closed Heating & Cooling System Expansion Vessel - 100Ltr

    The Reflex N 100 diaphragm expansion vessel is designed for sealed heating and cold water systems, providing reliable pressure control in closed-system installations.

    £344.28 RRP £241.00 £200.83
    In Stock In stock
    Delivery Icon Free Standard Delivery
  2. Reflex N Closed Heating & Cooling System Pressure Vessel - 200Ltr

    REFLEX-8213300

    Reflex - N200 Closed Heating & Cooling System Expansion Vessel - 200Ltr

    The Reflex N 200 diaphragm expansion vessel is designed for sealed heating and cold water systems, providing reliable pressure control in closed-system installations.

    £570.96 RRP £399.67 £333.06
    In Stock In stock
    Delivery Icon Free Standard Delivery
  3. Reflex N Closed Heating & Cooling System Pressure Vessel - 250Ltr

    RE-8214300

    Reflex - N250 Closed Heating & Cooling System Expansion Vessel - 250Ltr

    The Reflex N 250 diaphragm expansion vessel is designed for sealed heating and cold water systems, providing reliable pressure control in closed-system installations.

    £687.62 RRP £481.33 £401.11
    In Stock In stock
    Delivery Icon Free Standard Delivery
  4. Reflex N Closed Heating & Cooling System Pressure Vessel - 300Ltr

    RE-8215300

    Reflex - N300 Closed Heating & Cooling System Expansion Vessel - 300Ltr

    The Reflex N 300 diaphragm expansion vessel is designed for sealed heating and cold water systems, providing reliable pressure control in closed-system installations.

    £818.76 RRP £573.13 £477.61
    In Stock In stock
    Delivery Icon Free Standard Delivery
  5. Reflex N Closed Heating & Cooling System Pressure Vessel - 400Ltr

    RE-8218000

    Reflex - N400 Closed Heating & Cooling System Expansion Vessel - 400Ltr

    The Reflex N 400 diaphragm expansion vessel is designed for sealed heating and cold water systems, providing reliable pressure control in closed-system installations.

    £1,053.14 RRP £737.20 £614.33
    In Stock In stock
    Delivery Icon Free Standard Delivery
  6. Reflex N Closed Heating & Cooling System Pressure Vessel - 500Ltr

    RE-8218300

    Reflex - N500 Closed Heating & Cooling System Expansion Vessel - 500Ltr

    The Reflex N 500 diaphragm expansion vessel is designed for sealed heating and cold water systems, providing reliable pressure control in closed-system installations.

    £1,183.68 RRP £828.58 £690.48
    In Stock In stock
    Delivery Icon Free Standard Delivery
  7. Reflex N Closed Heating & Cooling System Pressure Vessel - 600Ltr

    RE-8218400

    Reflex - N600 Closed Heating & Cooling System Expansion Vessel - 600Ltr

    The Reflex N 600 diaphragm expansion vessel is designed for sealed heating and cold water systems, providing reliable pressure control in closed-system installations.

    £1,382.76 RRP £967.93 £806.61
    In Stock In stock
    Delivery Icon Free Standard Delivery
  8. Reflex N Closed Heating & Cooling System Pressure Vessel - 800Ltr

    n800l

    Reflex - N800 Closed Heating & Cooling System Expansion Vessel - 800Ltr

    The Reflex N 800 diaphragm expansion vessel is designed for sealed heating and cold water systems, providing reliable pressure control in closed-system installations.

    £2,120.33 RRP £1,484.23 £1,236.86
    In Stock In stock
    Delivery Icon Free Standard Delivery
  9. Flamco Flamcomat FG Vessel - 200Ltr

    17820

    Flamco - 200 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.

    Buy Flamco Flacomat VG Vessels from Pumpify and receive free standard delivery.

    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.

    £29,768.23 £24,806.86
    In Stock In stock
    Delivery Icon Free Standard Delivery
  10. Flamco Flamcomat FG Vessel - 300Ltr

    17821

    Flamco - 300 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.

    Buy Flamco Flacomat FG Vessels from Pumpify and receive free standard delivery.

    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.

    £29,213.44 £24,344.53
    In Stock In stock
    Delivery Icon Free Standard Delivery
  11. Flamco Flamcomat FG Vessel - 400Ltr

    17822

    Flamco - 400 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.

    Buy Flamco Flacomat FG Vessels from Pumpify and receive free standard delivery.

    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.

    £29,215.08 £24,345.90
    In Stock In stock
    Delivery Icon Free Standard Delivery
  12. Flamco Flamcomat FG Vessel - 500Ltr

    17823

    Flamco - 500 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.

    Buy Flamco Flacomat FG Vessels from Pumpify and receive free standard delivery.

    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.

    £29,216.71 £24,347.26
    In Stock In stock
    Delivery Icon Free Standard Delivery
  13. Flamco Flamcomat FG Vessel - 600Ltr

    17824

    Flamco - 600 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.

    Buy Flamco Flacomat FG Vessels from Pumpify and receive free standard delivery.

    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.

    £29,774.89 £24,812.41
    In Stock In stock
    Delivery Icon Free Standard Delivery
  14. Flamco Flamcomat FG Vessel - 800Ltr

    17825

    Flamco - 800 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.

    Buy Flamco Flacomat FG Vessels from Pumpify and receive free standard delivery.

    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.

    £29,220.00 £24,350.00
    In Stock In stock
    Delivery Icon Free Standard Delivery
  15. Flamco Flamcomat FG Vessel - 1000Ltr

    17826

    Flamco - 1000 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.

    Buy Flamco Flacomat FG Vessels from Pumpify and receive free standard delivery.

    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.

    £29,778.23 £24,815.19
    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.