Vessels

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  1. Flamco Airfix Expansion Vessel - P 18Ltr

    FL-Airfix P18

    Flamco - 18 Ltr - Airfix P Expansion Vessel - Potable Water - 10 bar

    Built for sealed potable hot and chilled water systems in domestic and commercial settings, these Potable Water Expansion Vessels stabilise pressure by absorbing thermal expansion for safe, reliable operation.

    A nitrogen pre-charge helps retain set pressure longer, while a single threaded steel connection with plastic insert provides a durable, non-flow-through design. Suitable for central heating, cooling and tap water applications (not for solar collector circuits).

    • Nitrogen gas filling for longer pre-charge retention
    • Single threaded steel connection with plastic insert (no flow-through)
    • Potable use supports domestic hot/chilled water
    • Heating & cooling compatible for sealed systems

    Designed for long service life with broad operating limits and glycol tolerance for demanding installations.

    £97.79 RRP £63.56 £52.97
    In Stock In stock
    Delivery Icon Free Standard Delivery
  2. Flamco Airfix Expansion Vessel - P 200Ltr

    FL-Airfix P200

    Flamco - 200 Ltr - Airfix P Expansion Vessel - Potable Water - 10 bar

    Built for sealed potable hot and chilled water systems in domestic and commercial settings, these Potable Water Expansion Vessels stabilise pressure by absorbing thermal expansion for safe, reliable operation.

    A nitrogen pre-charge helps retain set pressure longer, while a single threaded steel connection with plastic insert provides a durable, non-flow-through design. Suitable for central heating, cooling and tap water applications (not for solar collector circuits).

    • Nitrogen gas filling for longer pre-charge retention
    • Single threaded steel connection with plastic insert (no flow-through)
    • Potable use supports domestic hot/chilled water
    • Heating & cooling compatible for sealed systems

    Designed for long service life with broad operating limits and glycol tolerance for demanding installations.

    £915.74 RRP £595.24 £496.03
    In Stock In stock
    Delivery Icon Free Standard Delivery
  3. Flamco Airfix Expansion Vessel - P 24Ltr

    FL-Airfix P24

    Flamco - 24 Ltr - Airfix P Expansion Vessel - Potable Water - 10 bar

    Built for sealed potable hot and chilled water systems in domestic and commercial settings, these Potable Water Expansion Vessels stabilise pressure by absorbing thermal expansion for safe, reliable operation.

    A nitrogen pre-charge helps retain set pressure longer, while a single threaded steel connection with plastic insert provides a durable, non-flow-through design. Suitable for central heating, cooling and tap water applications (not for solar collector circuits).

    • Nitrogen gas filling for longer pre-charge retention
    • Single threaded steel connection with plastic insert (no flow-through)
    • Potable use supports domestic hot/chilled water
    • Heating & cooling compatible for sealed systems

    Designed for long service life with broad operating limits and glycol tolerance for demanding installations.

    £116.02 RRP £75.42 £62.85
    In Stock In stock
    Delivery Icon Free Standard Delivery
  4. Flamco Airfix Expansion Vessel - P 300Ltr

    FL-Airfix P300

    Flamco - 300 Ltr - Airfix P Expansion Vessel - Potable Water - 10 bar

    Built for sealed potable hot and chilled water systems in domestic and commercial settings, these Potable Water Expansion Vessels stabilise pressure by absorbing thermal expansion for safe, reliable operation.

    A nitrogen pre-charge helps retain set pressure longer, while a single threaded steel connection with plastic insert provides a durable, non-flow-through design. Suitable for central heating, cooling and tap water applications (not for solar collector circuits).

    • Nitrogen gas filling for longer pre-charge retention
    • Single threaded steel connection with plastic insert (no flow-through)
    • Potable use supports domestic hot/chilled water
    • Heating & cooling compatible for sealed systems

    Designed for long service life with broad operating limits and glycol tolerance for demanding installations.

    £1,228.04 RRP £798.23 £665.19
    In Stock In stock
    Delivery Icon Free Standard Delivery
  5. Flamco Airfix Expansion Vessel - P 35Ltr

    FL-Airfix P35

    Flamco - 35 Ltr - Airfix P Expansion Vessel - Potable Water - 10 bar

    Built for sealed potable hot and chilled water systems in domestic and commercial settings, these Potable Water Expansion Vessels stabilise pressure by absorbing thermal expansion for safe, reliable operation.

    A nitrogen pre-charge helps retain set pressure longer, while a single threaded steel connection with plastic insert provides a durable, non-flow-through design. Suitable for central heating, cooling and tap water applications (not for solar collector circuits).

    • Nitrogen gas filling for longer pre-charge retention
    • Single threaded steel connection with plastic insert (no flow-through)
    • Potable use supports domestic hot/chilled water
    • Heating & cooling compatible for sealed systems

    Designed for long service life with broad operating limits and glycol tolerance for demanding installations.

    £228.78 RRP £148.70 £123.92
    In Stock In stock
    Delivery Icon Free Standard Delivery
  6. Flamco Airfix Expansion Vessel - P 50Ltr

    FL-Airfix P50

    Flamco - 50 Ltr - Airfix P Expansion Vessel - Potable Water

    Built for sealed potable hot and chilled water systems in domestic and commercial settings, these Potable Water Expansion Vessels stabilise pressure by absorbing thermal expansion for safe, reliable operation.

    A nitrogen pre-charge helps retain set pressure longer, while a single threaded steel connection with plastic insert provides a durable, non-flow-through design. Suitable for central heating, cooling and tap water applications (not for solar collector circuits).

    • Nitrogen gas filling for longer pre-charge retention
    • Single threaded steel connection with plastic insert (no flow-through)
    • Potable use supports domestic hot/chilled water
    • Heating & cooling compatible for sealed systems

    Designed for long service life with broad operating limits and glycol tolerance for demanding installations.

    £272.85 RRP £177.36 £147.80
    In Stock In stock
    Delivery Icon Free Standard Delivery
  7. Flamco Airfix Expansion Vessel - P 500Ltr

    FL-Airfix P500

    Flamco - 500 Ltr - Airfix P Expansion Vessel - Potable Water

    Built for sealed potable hot and chilled water systems in domestic and commercial settings, these Potable Water Expansion Vessels stabilise pressure by absorbing thermal expansion for safe, reliable operation.

    A nitrogen pre-charge helps retain set pressure longer, while a single threaded steel connection with plastic insert provides a durable, non-flow-through design. Suitable for central heating, cooling and tap water applications (not for solar collector circuits).

    • Nitrogen gas filling for longer pre-charge retention
    • Single threaded steel connection with plastic insert (no flow-through)
    • Potable use supports domestic hot/chilled water
    • Heating & cooling compatible for sealed systems

    Designed for long service life with broad operating limits and glycol tolerance for demanding installations.

    £1,921.39 RRP £1,248.90 £1,040.75
    In Stock In stock
    Delivery Icon Free Standard Delivery
  8. Flamco Airfix Expansion Vessel - P 60Ltr

    FL-Airfix P60

    Flamco - 60 Ltr - Airfix P Expansion Vessel - Potable Water

    Built for sealed potable hot and chilled water systems in domestic and commercial settings, these Potable Water Expansion Vessels stabilise pressure by absorbing thermal expansion for safe, reliable operation.

    A nitrogen pre-charge helps retain set pressure longer, while a single threaded steel connection with plastic insert provides a durable, non-flow-through design. Suitable for central heating, cooling and tap water applications (not for solar collector circuits).

    • Nitrogen gas filling for longer pre-charge retention
    • Single threaded steel connection with plastic insert (no flow-through)
    • Potable use supports domestic hot/chilled water
    • Heating & cooling compatible for sealed systems

    Designed for long service life with broad operating limits and glycol tolerance for demanding installations.

    £344.21 RRP £223.74 £186.45
    In Stock In stock
    Delivery Icon Free Standard Delivery
  9. Flamco Airfix Expansion Vessel - P 750Ltr

    FL-Airfix P750

    Flamco - 750 Ltr - Airfix P Expansion Vessel - Potable Water

    Built for sealed potable hot and chilled water systems in domestic and commercial settings, these Potable Water Expansion Vessels stabilise pressure by absorbing thermal expansion for safe, reliable operation.

    A nitrogen pre-charge helps retain set pressure longer, while a single threaded steel connection with plastic insert provides a durable, non-flow-through design. Suitable for central heating, cooling and tap water applications (not for solar collector circuits).

    • Nitrogen gas filling for longer pre-charge retention
    • Single threaded steel connection with plastic insert (no flow-through)
    • Potable use supports domestic hot/chilled water
    • Heating & cooling compatible for sealed systems

    Designed for long service life with broad operating limits and glycol tolerance for demanding installations.

    £5,846.00 RRP £3,799.90 £3,166.58
    In Stock In stock
    Delivery Icon Free Standard Delivery
  10. Flamco Airfix Expansion Vessel - P 80Ltr

    FL-Airfix P80

    Flamco - 80 Ltr - Airfix P Expansion Vessel - Potable Water

    Built for sealed potable hot and chilled water systems in domestic and commercial settings, these Potable Water Expansion Vessels stabilise pressure by absorbing thermal expansion for safe, reliable operation.

    A nitrogen pre-charge helps retain set pressure longer, while a single threaded steel connection with plastic insert provides a durable, non-flow-through design. Suitable for central heating, cooling and tap water applications (not for solar collector circuits).

    • Nitrogen gas filling for longer pre-charge retention
    • Single threaded steel connection with plastic insert (no flow-through)
    • Potable use supports domestic hot/chilled water
    • Heating & cooling compatible for sealed systems

    Designed for long service life with broad operating limits and glycol tolerance for demanding installations.

    £423.54 RRP £275.30 £229.42
    In Stock In stock
    Delivery Icon Free Standard Delivery
  11. HeatWave Vessel - Vertical - 100Ltr

    GWS-HWB-100LV

    HeatWave - Vessel - Vertical - 100Ltr

    The HeatWave Vessel - Vertical - 100Ltr is a Pressure Vessel item.

    The HeatWave™ series hydronic expansion tanks provide quality protection for closed loop hydronic heating systems from excessive pressure due to thermal expansion.

    Easy to install and featuring an incorporated hex nut connection, HeatWave™ tanks feature an air chamber sealed with a brass air valve and O-ring sealed air cap.  developed to be supported by either system piping, wall-mounted bracket (inline models) or be freestanding (vertical model with base), the HeatWave™ has a maximum working temperature of 99° C / 210° F .

    The operating pressure of this is 6 bar.


    • Diaphragm design
    • Patented Stainless Steel (vertical models) or chromed steel (inline models) water connection
    • Two-part polyurethane, epoxy primed paint finish
    • Leak-free, O-ring sealed air valve cap
    • Maintenance Free
    This product is manufactured by Global.

    £367.78 RRP £267.74 £223.12
    In Stock In stock
    Delivery Icon Free Standard Delivery
  12. HeatWave Vessel - Inline - 12Ltr

    GWS-HWB-12LX

    HeatWave - Vessel - Inline - 12Ltr

    The HeatWave Vessel - Inline - 12Ltr is a Pressure Vessel item.

    The HeatWave™ series hydronic expansion tanks provide quality protection for closed loop hydronic heating systems from excessive pressure due to thermal expansion.

    Easy to install and featuring an incorporated hex nut connection, HeatWave™ tanks feature an air chamber sealed with a brass air valve and O-ring sealed air cap.  developed to be supported by either system piping, wall-mounted bracket (inline models) or be freestanding (vertical model with base), the HeatWave™ has a maximum working temperature of 99° C / 210° F .

    The operating pressure of this is 6 bar.


    • Diaphragm design
    • Patented Stainless Steel (vertical models) or chromed steel (inline models) water connection
    • Two-part polyurethane, epoxy primed paint finish
    • Leak-free, O-ring sealed air valve cap
    • Maintenance Free
    This product is manufactured by Global.

    £59.26 RRP £43.14 £35.95
    In Stock In stock
  13. HeatWave Vessel - Vertical - 150Ltr

    GWS-HWB-150LV

    HeatWave - Vessel - Vertical - 150Ltr

    The HeatWave Vessel - Vertical - 150Ltr is a Pressure Vessel item.

    The HeatWave™ series hydronic expansion tanks provide quality protection for closed loop hydronic heating systems from excessive pressure due to thermal expansion.

    Easy to install and featuring an incorporated hex nut connection, HeatWave™ tanks feature an air chamber sealed with a brass air valve and O-ring sealed air cap.  developed to be supported by either system piping, wall-mounted bracket (inline models) or be freestanding (vertical model with base), the HeatWave™ has a maximum working temperature of 99° C / 210° F .

    The operating pressure of this is 6 bar.


    • Diaphragm design
    • Patented Stainless Steel (vertical models) or chromed steel (inline models) water connection
    • Two-part polyurethane, epoxy primed paint finish
    • Leak-free, O-ring sealed air valve cap
    • Maintenance Free
    This product is manufactured by Global.

    £484.24 RRP £352.52 £293.77
    In Stock In stock
    Delivery Icon Free Standard Delivery
  14. HeatWave Vessel - Inline - 18Ltr

    GWS-HWB-18LX

    HeatWave - Vessel - Inline - 18Ltr

    The HeatWave Vessel - Inline - 18Ltr is a Pressure Vessel item.

    The HeatWave™ series hydronic expansion tanks provide quality protection for closed loop hydronic heating systems from excessive pressure due to thermal expansion.

    Easy to install and featuring an incorporated hex nut connection, HeatWave™ tanks feature an air chamber sealed with a brass air valve and O-ring sealed air cap.  developed to be supported by either system piping, wall-mounted bracket (inline models) or be freestanding (vertical model with base), the HeatWave™ has a maximum working temperature of 99° C / 210° F .

    The operating pressure of this is 6 bar.


    • Diaphragm design
    • Patented Stainless Steel (vertical models) or chromed steel (inline models) water connection
    • Two-part polyurethane, epoxy primed paint finish
    • Leak-free, O-ring sealed air valve cap
    • Maintenance Free
    This product is manufactured by Global.

    £67.46 RRP £49.12 £40.93
    In Stock In stock
  15. HeatWave Vessel - Inline - 24Ltr

    GWS-HWB-24LX

    HeatWave - Vessel - Inline - 24Ltr

    The HeatWave Vessel - Inline - 24Ltr is a Pressure Vessel item.

    The HeatWave™ series hydronic expansion tanks provide quality protection for closed loop hydronic heating systems from excessive pressure due to thermal expansion.

    Easy to install and featuring an incorporated hex nut connection, HeatWave™ tanks feature an air chamber sealed with a brass air valve and O-ring sealed air cap.  developed to be supported by either system piping, wall-mounted bracket (inline models) or be freestanding (vertical model with base), the HeatWave™ has a maximum working temperature of 99° C / 210° F .

    The operating pressure of this is 6 bar.


    • Diaphragm design
    • Patented Stainless Steel (vertical models) or chromed steel (inline models) water connection
    • Two-part polyurethane, epoxy primed paint finish
    • Leak-free, O-ring sealed air valve cap
    • Maintenance Free
    This product is manufactured by Global.

    £83.16 RRP £60.54 £50.45
    In Stock In stock
    Delivery Icon Free Standard Delivery
  16. HeatWave Vessel - Inline - 2Ltr

    GWS-HWB-2LX

    HeatWave - Vessel - Inline - 2Ltr

    The HeatWave Vessel - Inline - 2Ltr is a Pressure Vessel item.

    The HeatWave™ series hydronic expansion tanks provide quality protection for closed loop hydronic heating systems from excessive pressure due to thermal expansion.

    Easy to install and featuring an incorporated hex nut connection, HeatWave™ tanks feature an air chamber sealed with a brass air valve and O-ring sealed air cap.  developed to be supported by either system piping, wall-mounted bracket (inline models) or be freestanding (vertical model with base), the HeatWave™ has a maximum working temperature of 99° C / 210° F .

    The operating pressure of this is 6 bar.


    • Diaphragm design
    • Patented Stainless Steel (vertical models) or chromed steel (inline models) water connection
    • Two-part polyurethane, epoxy primed paint finish
    • Leak-free, O-ring sealed air valve cap
    • Maintenance Free
    This product is manufactured by Global.

    £49.90 RRP £36.32 £30.27
    In Stock In stock
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Vessels

Vessels

Pressure vessels and expansion vessels play a big role in keeping systems safe and balanced. Expansion vessels are commonly used in heating and hot water setups, where they absorb the natural rise in water volume as it heats. This keeps pressure under control, reduces the chance of leaks, and protects boilers, pumps, and pipework from damage.

 

Pressure vessels are found in pressurised water systems, including potable water supplies. By storing water under pressure, they cut down on pump cycling, extend system life, and deliver a steadier, more reliable flow.

 

At Pumpify, you’ll find both pressure and expansion vessels in a variety of sizes and specifications, so it’s simple to choose the right fit for your project.