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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 22/15mm Advantay Compact Pressure Reducing Valve c/w Gauge

    22/15mm Advantay Compact Pressure Reducing Valve c/w Gauge

    ADVRV01522
    22/15mm Advantay Compact Pressure Reducing Valve with 50mm pressure gauge. 1 to 4 bar, pre set at 3 bar adjustable pressure, max 15 bar. Max temp 80°c.
    Stock Availability: Out of stock
    Picture of 22mm Advantay Auto Bypass Valve (full bore)

    22mm Advantay Auto Bypass Valve (full bore)

    ADV5510022
    22mm Compression Automatic Full Bore 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.
    Stock Availability: 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.
    Stock Availability: Out of stock
    Picture of 63mm Advantay Combi T/P Gauge 0-6B/0-120C 1/2"

    63mm Advantay Combi T/P Gauge 0-6B/0-120C 1/2"

    AD91548600
    63mm Advantay combined pressure & temperature gauge. 1/2" back 0-6 bar & 0-120°c.
    Stock Availability: 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.
    Stock Availability: 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.
    Stock Availability: 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 .
    Stock Availability: Out of 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)
    Stock Availability: 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)
    Stock Availability: 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.
    Stock Availability: 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.
    Stock Availability: 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.
    Stock Availability: 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.
    Stock Availability: Out of 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.
    Stock Availability: 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.
    Stock Availability: 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
    Stock Availability: 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
    Stock Availability: 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
    Stock Availability: 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
    Stock Availability: Out of 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
    Stock Availability: In stock
    Picture of 25nb Crane PN10 Brass Automatic Air Vent D2003

    25nb Crane PN10 Brass Automatic Air Vent D2003

    D2003025
    25mm Crane PN10 Brass Automatic Air Vent D2003
    Stock Availability: Out of 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
    Stock Availability: 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
    Stock Availability: In 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
    Stock Availability: 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
    Stock Availability: Out of stock