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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 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 24L CORE Potable Expansion Vessel

    24L CORE Potable Expansion Vessel

    CPV24L
    CORE Potable Expansion Vessel 24 Litre. 10 bar Maximum Working Pressure. Working Temperature -10 - 100 °C. WRAS approved.
    Status: In Stock
    Picture of 18L CORE Potable Expansion Vessel

    18L CORE Potable Expansion Vessel

    CPV18L
    CORE Potable Expansion Vessel 18 Litre. 10 bar Maximum Working Pressure. Working Temperature -10 - 100 °C. WRAS approved.
    Status: In Stock
    Picture of 12L CORE Potable Expansion Vessel

    12L CORE Potable Expansion Vessel

    CPV12L
    CORE Potable Expansion Vessel 12 Litre. 10 bar Maximum Working Pressure. Working Temperature -10 - 100 °C. WRAS approved.
    Status: In Stock
    Picture of 8L CORE Potable Expansion Vessel

    8L CORE Potable Expansion Vessel

    CPV8L
    CORE Potable Expansion Vessel 8 Litre. 10 bar Maximum Working Pressure. Working Temperature -10 - 100 °C. WRAS approved.
    Status: In Stock
    Picture of Altecnic Reflex 300ltr Vert Vessel WRAS c/w Legs

    Altecnic Reflex 300ltr Vert Vessel WRAS c/w Legs

    ALTPV300W
    Altecnic Reflex 300 Litre Vertical Potable Expansion Heating Vessel comes with Legs - 10 Bar Max Working Pressure - Replaceable Membrane - WRAS Approved
    Status: Out of Stock
    Picture of Altecnic Reflex 200ltr Vert Vessel WRAS c/w Legs

    Altecnic Reflex 200ltr Vert Vessel WRAS c/w Legs

    ALTPV200W
    Altecnic Reflex 200 Litre Vertical Potable Expansion Heating Vessel comes with Legs - 10 Bar Max Working Pressure - Replaceable Membrane - WRAS Approved
    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 140ltr Vert Vessel WRAS c/w Legs

    Altecnic Reflex 140ltr Vert Vessel WRAS c/w Legs

    ALTPV140W
    Altecnic Reflex 140 Litre Vertical Potable Expansion Heating Vessel comes with Legs - 10 Bar Max Working Pressure - Fixed Membrane - WRAS Approved
    Status: In Stock
    Picture of Altecnic Reflex 100ltr Vert Vessel WRAS c/w Legs

    Altecnic Reflex 100ltr Vert Vessel WRAS c/w Legs

    ALTPV100W
    Altecnic Reflex 100 Litre Vertical Potable Expansion Heating Vessel comes with Legs - 10 Bar Max Working Pressure - Replaceable Membrane - WRAS Approved
    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 Altecnic Reflex 600ltr Vessel c/w Legs Htg System

    Altecnic Reflex 600ltr Vessel c/w Legs Htg System

    ALTHV600W
    Altecnic Reflex 600 Litre Vertical Potable Expansion Heating Vessel comes with Legs - 6 Bar Max Working Pressure - Replaceable Membrane - WRAS Approved
    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 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 Altecnic Reflex 500ltr Vessel c/w Legs Htg System

    Altecnic Reflex 500ltr Vessel c/w Legs Htg System

    ALTHV500W
    Altecnic Reflex 500 Litre Vertical Potable Expansion Heating Vessel comes with Legs - 6 Bar Max Working Pressure - Replaceable Membrane - WRAS Approved
    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 Altecnic Reflex 12ltr Vessel for Heating System

    Altecnic Reflex 12ltr Vessel for Heating System

    ALTHV12C
    Altecnic Reflex 12 Litre Expansion Heating Vessel - 4 Bar Max Working Pressure - Max Operating Temperature: 70°C
    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 2" Advantay Pressure Reducing Valve Female Union

    2" Advantay Pressure Reducing Valve Female Union

    AD0901600200
    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 Advantay AFH-200 CE horz 10bar Expansion Vessel

    Advantay AFH-200 CE horz 10bar Expansion Vessel

    AD0093500200
    Advantay 200 Litre Horizontal Expansion Vessel complete with universal pump mounting bracket. 1.1/4” Male Connection. Max Operating Pressure 10 bar (pre-set 1.5 bar), Max Operating Temp 99°C, Height 665mm - Blue
    Status: Out of Stock
    Picture of Advantay D-5 Potable Vessel

    Advantay D-5 Potable Vessel

    AD0093100005
    Advantay D series 5 Litre Potable Heating Expansion Vessel. 3/4” Male Connection. Max Operating Pressure 10 bar (pre-set 3 bar), Max Operating Temp 99°C, Height 225mm, Wall mounting (with suitable bracket) - White
    Status: Out of Stock
    Picture of Advantay ERCE 300 Heating Vessel (Floor Standing)

    Advantay ERCE 300 Heating Vessel (Floor Standing)

    AD0093000300
    Advantay ER series 300 Litre Free Standing Heating Expansion Vessel. 1” Male Connection. Max Operating Pressure 10 bar (pre-set 1.5 bar), Max Operating Temp 99°C, Height 1240mm – Red
    Status: In Stock
    Picture of Advantay ERCE 250 Heating Vessel (Floor Standing)

    Advantay ERCE 250 Heating Vessel (Floor Standing)

    AD0093000250
    Advantay ER series 250 Litre Free Standing Heating Expansion Vessel. 1” Male Connection. Max Operating Pressure 10 bar (pre-set 1.5 bar), Max Operating Temp 99°C, Height 1160mm – Red
    Status: Out of 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 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 1-1/4" 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 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 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 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 Advantay ER-18 Heating Vessel (Red)

    Advantay ER-18 Heating Vessel (Red)

    AD0093000018
    Advantay ER series 18 Litre Heating Expansion Vessel. 3/4” Male Connection. Max Operating Pressure 8 bar (pre-set 1.5 bar), Max Operating Temp 99°C, Height 410mm, Wall mounting (with suitable bracket) - Red
    Status: Out of 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 Advantay 5 to 24 Ltr Fixing Bracket, Strap, Plugs and Screws

    Advantay 5 to 24 Ltr Fixing Bracket, Strap, Plugs and Screws

    AD0099000524
    Advantay 5 to 24 Ltr Fixing Bracket, Strap, Plugs and Screws.
    Status: In Stock
    Picture of Advantay D-2 Potable Vessel

    Advantay D-2 Potable Vessel

    AD0093100002
    Advantay D series 2 Litre Potable Heating Expansion Vessel. 1/2” Male Connection. Max Operating Pressure 8 bar (pre-set 1.5 bar), Max Operating Temp 99°C, Height 230mm, Wall mounting (with suitable bracket) - White
    Status: In Stock
    Picture of Advantay Standard Combi Filling Loop c/w IV

    Advantay Standard Combi Filling Loop c/w IV

    AD0090200500
    Advantay 15mm Standard Filling Loop. Complete with ball valve, flexible hose, double check valve .
    Status: Out of Stock
    Picture of 3/4" Advantay Pressure Reducing Valve (no gauge)

    3/4" Advantay Pressure Reducing Valve (no gauge)

    AD0901110034
    3/4" Advantay Compact Pressure Reducing Valve BSP, F/F. 1 to 4 bar, pre set at 3 bar adjustable pressure, max 15 bar. Max temp 80°c. (no gauge)
    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 3/4" Advantay Auto Bypass Valve (Full Bore)

    3/4" Advantay Auto Bypass Valve (Full Bore)

    AD0055400034
    3/4” BSP M/F Automatic Full Bore Angled Bypass Valve. Used in heating systems, reduces system noise and maintains boiler efficiency. Can be used as a system or boiler bypass. Adjustable from 0.1 to 0.6bar, manufactured from brass.
    Status: In Stock
    Picture of 3/8" Advantay Auto Air Vent

    3/8" Advantay Auto Air Vent

    AD0050700038
    3/8" Advantay Auto Air Vent. 110°c with max pressure of 10 bar as standard.
    Status: Out of Stock
    Picture of Advantay Part L Compliant Filling Loop (Complete)

    Advantay Part L Compliant Filling Loop (Complete)

    AD0090200500PC
    Advantay 15mm Part L Compliant Standard Filling Loop. Complete with ball valve, flexible hose, double check valve with integral ball valve & end caps.
    Status: In Stock
    Picture of 1/2" Advantay Pressure Reducing Valve (no gauge)

    1/2" Advantay Pressure Reducing Valve (no gauge)

    AD0901110012
    1/2" Advantay Compact Pressure Reducing Valve BSP, F/F. 1 to 4 bar, pre set at 3 bar adjustable pressure, max 15 bar. Max temp 80°c. (no gauge)
    Status: In Stock