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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 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 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 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 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 110/82mm Airsure Air Admittance Valve

    110/82mm Airsure Air Admittance Valve

    FRG110W
    110/82mm Airsure Air Admittance Valve
    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 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 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 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 1000L CORE Potable Expansion Vessel

    1000L CORE Potable Expansion Vessel

    CPV1000L
    CORE Potable Expansion Vessel 1000 Litre. 10 bar Maximum Working Pressure. Working Temperature -10 - 100 °C. WRAS approved.
    Status: In Stock
    Picture of 1000L CORE Heating Expansion Vessel

    1000L CORE Heating Expansion Vessel

    CHV1000L
    CORE Heating Expansion Vessel 1000 Litre. 6 bar Maximum Working Pressure. Working Temperature -10 - 70°C. (with legs)
    Status: Out of Stock
    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 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 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 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 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 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 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 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: 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