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    Expansion vessels and hydropneumatic accumulators

    Ibaiondo CMF expansion vessel without feet, red, with threaded bottom connection
    Ibaiondo CMF expansion vessel with feet, red, vertical model
    Ibaiondo CMF fixed-membrane expansion vessel for heating and cooling systems
    Ibaiondo
    from €31,71
    Ibaiondo CMR expansion vessel without feet, white, for domestic hot water
    Ibaiondo CMR expansion vessel for domestic hot water, drinking-water membrane
    Ibaiondo
    from €42,63
    Ibaiondo SMF fixed-membrane solar expansion vessel without feet, front view
    Ibaiondo solar range: SMF vessel without feet beside the SMR-P with feet and the vertical SMR
    Ibaiondo SMF fixed-membrane expansion vessel for solar thermal systems
    Ibaiondo
    from €34,53
    Ibaiondo SMR-P replaceable-membrane solar expansion vessel with feet, front view
    Ibaiondo 220 SMR vertical solar expansion vessel, 200 litres, with feet and top cover
    Ibaiondo SMR replaceable-membrane expansion vessel for solar thermal systems
    Ibaiondo
    from €149,85
    HeatWave HWB-24LX inline grey heating expansion vessel, front view
    HeatWave HWB-24LX inline, three-quarter view
    HeatWave steel heating expansion vessel by Global Water Solutions
    Global Water Solutions
    from €21,24
    ThermoWave TWB-2LX 2 L inline DHW expansion vessel, Global Water Solutions
    ThermoWave TWB-4LX 4 L inline DHW expansion vessel, Global Water Solutions
    ThermoWave steel DHW expansion vessel by Global Water Solutions
    Global Water Solutions
    from €21,24
    SolarWave SWB-24LX inline white solar expansion vessel, front view
    SolarWave SWB-24LX inline, three-quarter view
    SolarWave steel solar expansion vessel by Global Water Solutions
    Global Water Solutions
    from €53,41
    Ibaiondo AMR series pressure tank on legs, red, front view
    Ibaiondo 24 AMR-E, 24 litres, red, without legs
    Ibaiondo AMR pressure tank with replaceable membrane, 24 to 700 litres
    Ibaiondo
    from €36,65
    Ibaiondo AMR-PLUS vertical pressure tank, blue, on legs, front view
    Ibaiondo AMR-PLUS vertical tank with top cover and legs, second view on white
    Ibaiondo AMR-PLUS pressure tank with replaceable membrane for booster pump sets
    Ibaiondo
    from €596,43
    Global Water Solutions PressureWave PWB-60LV, 60 L vertical pressure tank, front view
    Global Water Solutions PressureWave PWB-60LV, 60 L vertical pressure tank, three-quarter view
    Steel pressure tank Global Water Solutions PressureWave, 8 to 130 L
    Global Water Solutions
    from €60,45
    Global Water Solutions Challenger GCB-200LV, 200 L vertical pressure tank, front view
    Global Water Solutions Challenger GCB-300LV, 300 L vertical pressure tank, front view
    Steel pressure tank Global Water Solutions Challenger, 200 to 450 L
    Global Water Solutions
    from €758,74
    Global Water Solutions C2-Lite CAD C2B-60LV 60 L composite pressure tank, front view
    Global Water Solutions C2-Lite CAD C2B-80LV 80 L composite pressure tank, front view
    Composite pressure tank Global Water Solutions C2-Lite CAD, 60 to 450 L
    Global Water Solutions
    from €388,24
    Ibaiondo replacement membrane for AMR pressure tank
    Ibaiondo replacement membrane for AMR-E and AMR-B160 pressure tanks
    Ibaiondo
    from €15,93
    Ibaiondo replacement membrane for AMR-PLUS pressure tank
    Ibaiondo replacement membrane for AMR-PLUS pressure tanks, 200 to 900 litres
    Ibaiondo
    from €343,04
    Soporte Vaso de Expansión de 5 a 40 litros ref. 021025 - Q-Tech ® 2026
    Expansion Vessel Bracket 5 to 40 liters ref. 021025
    Potermic
    €10,62
    Expansion vessel bracket - Heating
    Likitech
    €76,75
    Soporte inox para vasos de expansión ACS de 5 a 40 litros - Q-Tech® 2026
    Soporte inox para vasos de expansión ACS de 5 a 40 litros - Q-Tech® 2026
    Stainless steel support for DHW expansion vessels
    Likitech
    €116,62
    Save €37,91
    Deposito tampon o de preajuste Viessmann 7188623 - vista lateral - Q-Tech ® 2024 2025
    Viessmann buffer or pre-adjustment tank
    Viessmann
    €218,45 €180,54

    Expansion vessels and pressure tanks for heating, hot water, solar and booster pump sets

    An expansion vessel absorbs the increase in water volume as it heats up and keeps the pressure of a circuit stable; a pressure tank holds a reserve of pressurised water next to the pump or booster pump set. Here you will find those from Ibaiondo and Global Water Solutions, their replacement membranes and the brackets.

    Choose your collection

    CollectionWhat forBrands and series
    Ibaiondo expansion vesselsHeating, domestic hot water, solar thermal and booster pump sets, with replacement membranesIbaiondo CMF, CMR, SMF, SMR, AMR and AMR-PLUS
    Likitech expansion vesselsHeating, domestic hot water, solar thermal and cold-water booster pump setsGlobal Water Solutions HeatWave, ThermoWave, SolarWave, PressureWave, Challenger and C2-Lite CAD
    Expansion vessel accessoriesMounting and protecting the vesselPotermic and Likitech wall brackets and Viessmann pre-vessel

    Why buy your expansion vessel from Q-Tech?

    1. We build it into a pre-assembled plant room: assembled and tested in our workshop, it arrives at your site ready to connect.
    2. If your system already exists, an on-site hourly Expert Technician connects the vessel and checks its air pressure.
    3. For selection questions there is the remote technical call with an Expert Technician, and for orders, WhatsApp.

    Go to the collection for your brand and choose the series to suit your circuit.

    Updated 11-11-2026 · v5.4