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    Expansion Vessels & Ancillaries

    Expansion vessels, also known as expansion tanks, can be found in most domestic pressurised heating systems. If you have a combi boiler, you will have an expansion vessel. This vessel contains air and water from the central heating system, and its purpose is to maintain the right level of pressure in the system.

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    Picture of Advantay ER-24 CE Heating Vessel (Red)

    Advantay ER-24 CE Heating Vessel (Red)

    AD0093000024
    Advantay ER series 24 Litre Heating Expansion Vessel. 3/4” Male Connection. Max Operating Pressure 8 bar (pre-set 1.5 bar), Max Operating Temp 99°C, Height 355mm, Wall mounting (with suitable bracket) - Red
    Status: Out of Stock
    Picture of Altecnic Reflex 25ltr Vessel for Heating System

    Altecnic Reflex 25ltr Vessel for Heating System

    ALTHV25C
    Altecnic Reflex 25 litre Expansion Heating Vessel - 4 Bar Max Working Pressure - Max Operating Temperature: 70°C
    Status: In Stock
    Picture of 35L CORE Potable Expansion Vessel

    35L CORE Potable Expansion Vessel

    CPV35L
    CORE Potable Expansion Vessel 35 Litre. 10 bar Maximum Working Pressure. Working Temperature -10 - 100 °C. WRAS approved.
    Status: In Stock
    Picture of Advantay D-11 Potable Vessel

    Advantay D-11 Potable Vessel

    AD0093100011
    Advantay D series 11 Litre Potable Heating Expansion Vessel. 3/4” Male Connection. Max Operating Pressure 10 bar (pre-set 3 bar), Max Operating Temp 99°C, Height 300mm, Wall mounting (with suitable bracket) - White
    Status: Out of Stock
    Picture of Altecnic Reflex 10ltr Flat Round Heating Vessel

    Altecnic Reflex 10ltr Flat Round Heating Vessel

    ALTHV10F
    Altecnic Reflex 10 Litre Compact Round Flat Expansion Heating Vessel - 3 Bar Max Working Pressure
    Status: Out of Stock
    Picture of 80L CORE Heating Expansion Vessel

    80L CORE Heating Expansion Vessel

    CHV80L
    CORE Heating Expansion Vessel 80 Litre. 6 bar Maximum Working Pressure. Working Temperature -10 - 70°C. (with legs)
    Status: In Stock
    Picture of Altecnic Reflex 8ltr Vert Vessel WRAS

    Altecnic Reflex 8ltr Vert Vessel WRAS

    ALTPV8W
    Altecnic Reflex 8 Litre Vertical Potable Expansion Heating Vessel - 10 Bar Max Working Pressure - Max Operating Temperature 70˚C - WRAS Approved
    Status: In Stock
    Picture of 1/2" Flamco Flexvent Top

    1/2" Flamco Flexvent Top

    FLEXT015
    1/2" Flamco Float Operated Flexvent Top - Minimum/Maximum working pressure 0.2 / 10.0 bar
    Status: Out of Stock
    Picture of Altecnic Reflex 12ltr Vert Vessel WRAS

    Altecnic Reflex 12ltr Vert Vessel WRAS

    ALTPV12W
    Altecnic Reflex 12 Litre Vertical Potable Expansion Heating Vessel - 10 Bar Max Working Pressure - Max Operating Temperature 70˚C - WRAS Approved
    Status: In Stock
    Picture of 50L CORE Potable Expansion Vessel

    50L CORE Potable Expansion Vessel

    CPV50L
    CORE Potable Expansion Vessel 50 Litre. 10 bar Maximum Working Pressure. Working Temperature -10 - 100 °C. WRAS approved.
    Status: In Stock
    Picture of Heatrae Sadia Pack U2 Expansion Vessel,PRV & NRV

    Heatrae Sadia Pack U2 Expansion Vessel,PRV & NRV

    95970351
    Heatrae Sadia Pack U2 Expansion Vessel, PRV & NRV
    Status: In Stock
    Picture of 15nb Crane PN10 Brass Automatic Air Vent D2003

    15nb Crane PN10 Brass Automatic Air Vent D2003

    D2003015
    15mm Crane PN10 Brass Automatic Air Vent D2003
    Status: In Stock
    Picture of Altecnic Reflex 18ltr Vert Vessel WRAS

    Altecnic Reflex 18ltr Vert Vessel WRAS

    ALTPV18W
    Altecnic Reflex 18 Litre Vertical Potable Expansion Heating Vessel - 10 Bar Max Working Pressure - Max Operating Temperature 70˚C - WRAS Approved
    Status: In Stock
    Picture of Altecnic Reflex 25ltr Vert Vessel WRAS

    Altecnic Reflex 25ltr Vert Vessel WRAS

    ALTPV25W
    Altecnic Reflex 25 Litre Vertical Potable Expansion Heating Vessel - 10 Bar Max Working Pressure - Max Operating Temperature 70˚C - WRAS Approved
    Status: In Stock
    Picture of 100L CORE Heating Expansion Vessel

    100L CORE Heating Expansion Vessel

    CHV100L
    CORE Heating Expansion Vessel 100 Litre. 6 bar Maximum Working Pressure. Working Temperature -10 - 70°C. (with legs)
    Status: In Stock
    Picture of 1/2" Spirotop A.A.V. Type "A"

    1/2" Spirotop A.A.V. Type "A"

    SPIRO015
    1/2" Spirotop Brass Automatic Air Vent AAV Type 'A'
    Status: In Stock
    Picture of Advantay ERCE 35 Heating Vessel (Integral Bracket)

    Advantay ERCE 35 Heating Vessel (Integral Bracket)

    AD0093000035
    Advantay ER series 35 Litre Heating Expansion Vessel with Integrated Bracket. 3/4” Male Connection. Max Operating Pressure 10 bar (pre-set 1.5 bar), Max Operating Temp 99°C, Height 390mm – Red
    Status: Out of Stock
    Picture of 1/2" Flamco Flexvent Super

    1/2" Flamco Flexvent Super

    FLEXS015
    1/2" Flamco Float Operated Conical Flexvent Super - Minimum/Maximum working pressure 0.2 / 10.0 bar
    Status: In Stock
    Picture of 80L CORE Potable Expansion Vessel

    80L CORE Potable Expansion Vessel

    CPV80L
    CORE Potable Expansion Vessel 80 Litre. 10 bar Maximum Working Pressure. Working Temperature -10 - 100 °C. WRAS approved.
    Status: In Stock
    Picture of Altecnic Reflex 35ltr Vessel c/w Legs Htg System

    Altecnic Reflex 35ltr Vessel c/w Legs Htg System

    ALTHV35C
    Altecnic Reflex 35 Litre Expansion Heating Vessel comes with Legs - 3 Bar Max Working Pressure
    Status: In Stock
    Picture of Advantay ERCE 50 Heating Vessel (Integral Bracket)

    Advantay ERCE 50 Heating Vessel (Integral Bracket)

    AD0093000050
    Advantay ER series 50 Litre Heating Expansion Vessel with Integrated Bracket. 3/4” Male Connection. Max Operating Pressure 10 bar (pre-set 1.5 bar), Max Operating Temp 99°C, Height 500mm – Red
    Status: Out of Stock
    Picture of 150L CORE Heating Expansion Vessel

    150L CORE Heating Expansion Vessel

    CHV150L
    CORE Heating Expansion Vessel 150 Litre. 6 bar Maximum Working Pressure. Working Temperature -10 - 70°C. (with legs)
    Status: In Stock
    Picture of Advantay D-35 CE Potable Vessel

    Advantay D-35 CE Potable Vessel

    AD0093100035
    Advantay D series 35 Litre Potable Heating Expansion Vessel. 1” Male Connection. Max Operating Pressure 10 bar (pre-set 3 bar), Max Operating Temp 99°C, Height 390mm, Wall mounting (with suitable bracket) - White
    Status: Out of Stock
    Picture of 100L CORE Potable Expansion Vessel

    100L CORE Potable Expansion Vessel

    CPV100L
    CORE Potable Expansion Vessel 100 Litre. 10 bar Maximum Working Pressure. Working Temperature -10 - 100 °C. WRAS approved.
    Status: In Stock
    Picture of 15nb Winns Type B Auto Air Vent

    15nb Winns Type B Auto Air Vent

    WINB
    15nb Winns Brass Type B Automatic Air Vent Eliminator
    Status: In Stock
    Picture of Altecnic Reflex 50ltr Vessel c/w Legs Htg System

    Altecnic Reflex 50ltr Vessel c/w Legs Htg System

    ALTHV50C
    Altecnic Reflex 50 Litre Expansion Heating Vessel comes with Legs - 6 Bar Max Working Pressure
    Status: In Stock
    Picture of 200L CORE Heating Expansion Vessel

    200L CORE Heating Expansion Vessel

    CHV200L
    CORE Heating Expansion Vessel 200 Litre. 6 bar Maximum Working Pressure. Working Temperature -10 - 70°C. (with legs)
    Status: In Stock
    Picture of 15nb Winns Type C Auto Air Vent

    15nb Winns Type C Auto Air Vent

    WINC
    15nb Winns Brass Type C Automatic Air Vent Eliminator
    Status: Out of Stock
    Picture of Altecnic Reflex 33ltr Vert Vessel WRAS c/w Brkt

    Altecnic Reflex 33ltr Vert Vessel WRAS c/w Brkt

    ALTPV33W
    Altecnic Reflex 33 Litre Vertical Potable Expansion Heating Vessel comes with bracket - 10 Bar Max Working Pressure - Max Operating Temperature 70˚C - Fixed Membrane - WRAS Approved
    Status: In Stock
    Picture of 150L CORE Potable Expansion Vessel

    150L CORE Potable Expansion Vessel

    CPV150L
    CORE Potable Expansion Vessel 150 Litre. 10 bar Maximum Working Pressure. Working Temperature -10 - 100 °C. WRAS approved.
    Status: In Stock
    Picture of 200L CORE Potable Expansion Vessel

    200L CORE Potable Expansion Vessel

    CPV200L
    CORE Potable Expansion Vessel 200 Litre. 10 bar Maximum Working Pressure. Working Temperature -10 - 100 °C. WRAS approved.
    Status: In Stock
    Picture of 300L CORE Heating Expansion Vessel

    300L CORE Heating Expansion Vessel

    CHV300L
    CORE Heating Expansion Vessel 300 Litre. 6 bar Maximum Working Pressure. Working Temperature -10 - 70°C. (with legs)
    Status: In Stock
    Picture of Altecnic Reflex 50ltr Vert Vessel WRAS c/w Legs

    Altecnic Reflex 50ltr Vert Vessel WRAS c/w Legs

    ALTPV50W
    Altecnic Reflex 50 Litre Vertical Potable Expansion Heating Vessel comes with Legs - 10 Bar Max Working Pressure - Replaceable Membrane - WRAS Approved
    Status: In Stock
    Picture of Advantay ERCE 100 Heating Vessel (Floor Standing)

    Advantay ERCE 100 Heating Vessel (Floor Standing)

    AD0093000100
    Advantay ER series 100 Litre Free Standing Heating Expansion Vessel. 3/4” Male Connection. Max Operating Pressure 10 bar (pre-set 1.5 bar), Max Operating Temp 99°C, Height 775mm – Red
    Status: Out of Stock
    Picture of Altecnic Reflex 80ltr Vessel c/w Legs Htg System

    Altecnic Reflex 80ltr Vessel c/w Legs Htg System

    ALTHV80C
    Altecnic Reflex 80 Litre Expansion Heating Vessel comes with Legs - 6 Bar Max Working Pressure
    Status: In Stock
    Picture of 400L CORE Heating Expansion Vessel

    400L CORE Heating Expansion Vessel

    CHV400L
    CORE Heating Expansion Vessel 400 Litre. 6 bar Maximum Working Pressure. Working Temperature -10 - 70°C. (with legs)
    Status: In Stock
    Picture of 1-1/2" Advantay Pressure Reducing Valve Female Union

    1-1/2" Advantay Pressure Reducing Valve Female Union

    AD0901600112
    1-1/2" Advantay Pressure Reducing Valve BSP, F/F union fittings. Adjustable between 0.5 to 6 bar. Pre set 3 bar maximum inlet pressure of 25 bar. Maximum water temperature of 80°c. Suitable for fluid, water and compressed air.
    Status: In Stock
    Picture of 1-1/4" Advantay Pressure Reducing Valve Female Union

    1-1/4" Advantay Pressure Reducing Valve Female Union

    AD0901600114
    1-1/4" Advantay Pressure Reducing Valve BSP, F/F union fittings. Adjustable between 0.5 to 6 bar. Pre set 3 bar maximum inlet pressure of 25 bar. Maximum water temperature of 80°c. Suitable for fluid, water and compressed air.
    Status: Out of Stock
    Picture of 500L CORE Heating Expansion Vessel

    500L CORE Heating Expansion Vessel

    CHV500L
    CORE Heating Expansion Vessel 500 Litre. 6 bar Maximum Working Pressure. Working Temperature -10 - 70°C. (with legs)
    Status: In Stock
    Picture of 300L CORE Potable Expansion Vessel

    300L CORE Potable Expansion Vessel

    CPV300L
    CORE Potable Expansion Vessel 300 Litre. 10 bar Maximum Working Pressure. Working Temperature -10 - 100 °C. WRAS approved.
    Status: In Stock