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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 1/4" PT90 Test Point

    1/4" PT90 Test Point

    TA52179-009
    1/4" PT90 Brass Pressure Test Point BSP Thread
    Status: In 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 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 1/2" Automatic Air Vent for Water

    1/2" Automatic Air Vent for Water

    AAV015
    1/2" Automatic Air Vent for Water
    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 8L CORE Heating Expansion Vessel

    8L CORE Heating Expansion Vessel

    CHV8L
    CORE Heating Expansion Vessel 8 Litre. 6 bar Maximum Working Pressure. Working Temperature -10 - 70°C.
    Status: In Stock
    Picture of 12L CORE Heating Expansion Vessel

    12L CORE Heating Expansion Vessel

    CHV12L
    CORE Heating Expansion Vessel 12 Litre. 6 bar Maximum Working Pressure. Working Temperature -10 - 70°C.
    Status: In Stock
    Picture of 1/2" Auto Air Vent ART1360

    1/2" Auto Air Vent ART1360

    ALBAAV015
    Automatic Air Vent. BSP Parallel Male Ends (ISO 228/1). Body Brass CW617N Nickel Plated. 10 Bar Rated. +5°C to +110°C.
    Status: Out of Stock
    Picture of 15mm Ecofil Plus Filling Loop (G24 Approved)

    15mm Ecofil Plus Filling Loop (G24 Approved)

    ALTCA300606
    Ecofil Plus Filling Loop with check valves (G24 Approved). Used to fill sealed systems from the mains cold water. WRAS approved.
    Status: In Stock
    Picture of 18L CORE Heating Expansion Vessel

    18L CORE Heating Expansion Vessel

    CHV18L
    CORE Heating Expansion Vessel 18 Litre. 6 bar Maximum Working Pressure. Working Temperature -10 - 70°C.
    Status: In Stock
    Picture of 1/2" CORE 508 Auto Air Vent c/w Check Valve (AAV)

    1/2" CORE 508 Auto Air Vent c/w Check Valve (AAV)

    AD0050800012
    1/2" Automatic Air Release Valve with isolating check valve. Max pressure 10 bar, max temperature 110°c.
    Status: In Stock
    Picture of 15mm CORE Filling Loop (WRAS Approved)

    15mm CORE Filling Loop (WRAS Approved)

    FL015
    15mm CORE Filling Loop with caps and collars (WRAS Approved). Used to fill sealed systems from the mains cold water.
    Status: In Stock
    Picture of 25L CORE Heating Expansion Vessel

    25L CORE Heating Expansion Vessel

    CHV25L
    CORE Heating Expansion Vessel 25 Litre. 6 bar Maximum Working Pressure. Working Temperature -10 - 70°C.
    Status: In Stock
    Picture of 110/82mm Airsure Air Admittance Valve

    110/82mm Airsure Air Admittance Valve

    FRG110W
    110/82mm Airsure Air Admittance Valve
    Status: In 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 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 3/8" Flamco Flexvent

    3/8" Flamco Flexvent

    FLEX010
    3/8" Flamco Float Operated Flexvent - Minimum/Maximum working pressure 0.2 / 10.0 bar -Brass
    Status: In Stock
    Picture of 1/2" Flamco Flexvent

    1/2" Flamco Flexvent

    FLEX015
    1/2" Flamco Float Operated Flexvent - Minimum/Maximum working pressure 0.2 / 10.0 bar
    Status: In Stock
    Picture of 15mm Altecnic Remote Filling Loop c/w Gauge

    15mm Altecnic Remote Filling Loop c/w Gauge

    ALTST0035
    Altecnic Remote Filling Loop with Gauge. Max Static Pressure: 10 bar. Max Fluid Temperature: 100°C
    Status: In Stock
    Picture of 35L CORE Heating Expansion Vessel

    35L CORE Heating Expansion Vessel

    CHV35L
    CORE Heating Expansion Vessel 35 Litre. 6 bar Maximum Working Pressure. Working Temperature -10 - 70°C. (with legs)
    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
    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 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 3/8" Zeparo ZUP Automatic Air Vent

    3/8" Zeparo ZUP Automatic Air Vent

    TA7891510
    3/8" Zeparo ZUP 10 Automatic Air Vent - 6 Bar, Male thread, Vertical installation.
    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 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 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 Altecnic Reflex 12Ltr Vessel For Heating System c/w Bracket

    Altecnic Reflex 12Ltr Vessel For Heating System c/w Bracket

    ALTHVB12C
    Altecnic Reflex 12 Litre Expansion Heating Vessel comes with Bracket - 4 Bar Max Working Pressure - Max Operating Temperature: 70°C
    Status: In Stock
    Zip AQ3 Pressure Reducer & Line Strainer

    Zip Pressure Reducer & Line Strainer

    ZPAQ3
    Zip Combined Pressure Reducer Valve and Line Strainer - AQ3
    Status: In Stock
    Zip AQ2 Expansion Vessel & Check Valve

    Zip Expansion Vessel & Check Valve

    ZPAQ2
    Zip 2 Litre Expansion Vessel & Check Valve (3.5bar) Unvented Installation Kit – AQ2

    Compatible with 5, 10 and 15L Zip Aquapoint and Varipoint water heaters
    Status: In Stock
    Picture of 50L CORE Heating Expansion Vessel

    50L CORE Heating Expansion Vessel

    CHV50L
    CORE Heating Expansion Vessel 50 Litre. 6 bar Maximum Working Pressure. Working Temperature -10 - 70°C. (with legs)
    Status: In 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 Heatrae Sadia Pack U1 Pressure Reducing Valve & Strainer

    Heatrae Sadia Pack U1 Pressure Reducing Valve & Strainer

    95970352
    Heatrae Sadia Pack U1 Pressure Reducing Valve & Strainer
    Status: In Stock
    Picture of 15nb Hattersley 775 Auto Air Vent

    15nb Hattersley 775 Auto Air Vent

    H775015
    15mm Hattersley PN10 Automatic Air Vent Fig.775
    Status: In Stock
    Zip AQ1 Pressure & Temperature Relief Valve

    Zip Pressure & Temperature Relief Valve

    ZPAQ1
    Zip Pressure and Temperature Relief Valve (7 bar) - AQ1

    Compatible with 5, 10 and 15L Zip Aquapoint and Varipoint water heaters
    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 8ltr Vessel for Heating System

    Altecnic Reflex 8ltr Vessel for Heating System

    ALTHV8C
    Altecnic Reflex 8 Litre Expansion Heating Vessel - 4 Bar Max Working Pressure - Max Operating Temperature: 70°C
    Status: In 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 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 Altecnic Reflex 18ltr Vessel for Heating System

    Altecnic Reflex 18ltr Vessel for Heating System

    ALTHV18C
    Altecnic Reflex 18 Litre Expansion Heating Vessel - 4 Bar Max Working Pressure - Max Operating Temperature: 70°C
    Status: In Stock
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