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Grundfos GT Hot Water Expansion Tanks

Grundfos GT tanks ensure long, maintenance-free, reliable and controlled operation and can be integrated in many different systems with a wide variety of pumps. The large number of tank sizes and types available makes it possible to select the pressure tank that best suits your application and system.

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    Grundfos GT Hot Water Expansion Tanks
    GT-HR-50 V (50L) Hot Water Expansion Tank - 96573395

    Grundfos GT tanks ensure long, maintenance-free, reliable and controlled operation and can be integrated in many different systems with a wide variety of pumps. The large number of…

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    Grundfos GT Hot Water Expansion Tanks
    GT-HR-80 V (80L) Hot Water Expansion Tank - 96573396

    Grundfos GT tanks ensure long, maintenance-free, reliable and controlled operation and can be integrated in many different systems with a wide variety of pumps. The large number of…

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    Grundfos GT Hot Water Expansion Tanks
    GT-HR-100 V (100L) Hot Water Expansion Tank - 96573397

    Grundfos GT tanks ensure long, maintenance-free, reliable and controlled operation and can be integrated in many different systems with a wide variety of pumps. The large number of…

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    Grundfos GT Hot Water Expansion Tanks
    GT-HR-140 V (140L) 6bar Hot Water Expansion Tank - 96573398

    Grundfos GT tanks ensure long, maintenance-free, reliable and controlled operation and can be integrated in many different systems with a wide variety of pumps. The large number of…

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    Grundfos GT Hot Water Expansion Tanks
    GT-HR-200 V (200L) 6bar Hot Water Expansion Tank - 96573399

    Grundfos GT tanks ensure long, maintenance-free, reliable and controlled operation and can be integrated in many different systems with a wide variety of pumps. The large number of…

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    Grundfos GT Hot Water Expansion Tanks
    GT-HR-250 V (250L) 6bar Hot Water Expansion Tank - 96573400

    Grundfos GT tanks ensure long, maintenance-free, reliable and controlled operation and can be integrated in many different systems with a wide variety of pumps. The large number of…

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    Grundfos GT Hot Water Expansion Tanks
    GT-HR-300 V (300L) 6bar Hot Water Expansion Tank - 96573401

    Grundfos GT tanks ensure long, maintenance-free, reliable and controlled operation and can be integrated in many different systems with a wide variety of pumps. The large number of…

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    Grundfos GT Hot Water Expansion Tanks
    GT-HR-400 V (400L) 6bar Hot Water Expansion Tank - 96573403

    Grundfos GT tanks ensure long, maintenance-free, reliable and controlled operation and can be integrated in many different systems with a wide variety of pumps. The large number of…

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    Grundfos GT Hot Water Expansion Tanks
    GT-HR-500 V (500L) 6bar Hot Water Expansion Tank - 96573404

    Grundfos GT tanks ensure long, maintenance-free, reliable and controlled operation and can be integrated in many different systems with a wide variety of pumps. The large number of…

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    Grundfos GT Hot Water Expansion Tanks
    GT-HR-600 V (600L) 6bar Hot Water Expansion Tank - 96573405

    Grundfos GT tanks ensure long, maintenance-free, reliable and controlled operation and can be integrated in many different systems with a wide variety of pumps. The large number of…

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    Grundfos GT Hot Water Expansion Tanks
    GT-HR-800 V (800L) 6bar Hot Water Expansion Tank - 96573407

    Grundfos GT tanks ensure long, maintenance-free, reliable and controlled operation and can be integrated in many different systems with a wide variety of pumps. The large number of…

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    Grundfos GT Hot Water Expansion Tanks
    GT-HR-1000 V (1000L) 6bar Hot Water Expansion Tank - 96573408

    Grundfos GT tanks ensure long, maintenance-free, reliable and controlled operation and can be integrated in many different systems with a wide variety of pumps. The large number of…

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    Grundfos GT Hot Water Expansion Tanks
    Vertical GT-U+ 100V (100L) 10bar Hot Water Expansion Tank - 99082696

    Grundfos GT tanks ensure long, maintenance-free, reliable and controlled operation and can be integrated in many different systems with a wide variety of pumps. The large number of…

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    Grundfos GT Hot Water Expansion Tanks
    Vertical GT-U+ 150V (150L) 10bar Hot Water Expansion Tank - 99082697

    The GT-U+ tanks are steel pressure tanks with a replaceable, non-toxic butyl rubber bladder enclosed by compressed nitrogen, equipped with a Manometer and a connection…

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    Grundfos GT Hot Water Expansion Tanks
    Vertical GT-U+ 200V (200L) 10bar Hot Water Expansion Tank - 99082698

    The GT-U+ tanks are steel pressure tanks with a replaceable, non-toxic butyl rubber bladder enclosed by compressed nitrogen, equipped with a Manometer and a connection…

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    Grundfos GT Hot Water Expansion Tanks
    Vertical GT-U+ 300V (300L) 10bar Hot Water Expansion Tank - 99082699

    The GT-U+ tanks are steel pressure tanks with a replaceable, non-toxic butyl rubber bladder enclosed by compressed nitrogen, equipped with a Manometer and a connection…

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    Grundfos GT Hot Water Expansion Tanks
    Vertical GT-U+ 500V (500L) 10bar Hot Water Expansion Tank - 99082700

    The GT-U+ tanks are steel pressure tanks with a replaceable, non-toxic butyl rubber bladder enclosed by compressed nitrogen, equipped with a Manometer and a connection…

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    Grundfos GT Hot Water Expansion Tanks
    Vertical GT-U+ 750V (750L) 10bar Hot Water Expansion Tank - 99082701

    The GT-U+ tanks are steel pressure tanks with a replaceable, non-toxic butyl rubber bladder enclosed by compressed nitrogen, equipped with a Manometer and a connection…

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    Grundfos GT Hot Water Expansion Tanks
    Vertical GT-U+ 1000V (1000L) 10bar Hot Water Expansion Tank - 99082702

    The GT-U+ tanks are steel pressure tanks with a replaceable, non-toxic butyl rubber bladder enclosed by compressed nitrogen, equipped with a Manometer and a connection…

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    Grundfos GT Hot Water Expansion Tanks
    Vertical GT-U+ 1500V (1500L) 10bar Hot Water Expansion Tank - 99082703

    The GT-U+ tanks are steel pressure tanks with a replaceable, non-toxic butyl rubber bladder enclosed by compressed nitrogen, equipped with a Manometer and a connection…

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    Grundfos GT Hot Water Expansion Tanks
    Vertical GT-U+ 2000V (2000L) 10bar Hot Water Expansion Tank - 99082704

    The GT-U+ tanks are steel pressure tanks with a replaceable, non-toxic butyl rubber bladder enclosed by compressed nitrogen, equipped with a Manometer and a connection…

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    Grundfos GT Hot Water Expansion Tanks
    Vertical GT-U+ 100V (100L) 16bar Hot Water Expansion Tank - 99082706

    The GT-U+ tanks are steel pressure tanks with a replaceable, non-toxic butyl rubber bladder enclosed by compressed nitrogen, equipped with a Manometer and a connection…

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    Grundfos GT Hot Water Expansion Tanks
    Vertical GT-U+ 150V (150L) 16bar Hot Water Expansion Tank - 99082707

    The GT-U+ tanks are steel pressure tanks with a replaceable, non-toxic butyl rubber bladder enclosed by compressed nitrogen, equipped with a Manometer and a connection…

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    Logo for Grundfos
    Grundfos GT Hot Water Expansion Tanks
    Vertical GT-U+ 200V (200L) 16bar Hot Water Expansion Tank - 99082708

    The GT-U+ tanks are steel pressure tanks with a replaceable, non-toxic butyl rubber bladder enclosed by compressed nitrogen, equipped with a Manometer and a connection…

    View Product
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    Grundfos GT Hot Water Expansion Tanks
    Vertical GT-U+ 300V (300L) 16bar Hot Water Expansion Tank - 99082709

    The GT-U+ tanks are steel pressure tanks with a replaceable, non-toxic butyl rubber bladder enclosed by compressed nitrogen, equipped with a Manometer and a connection…

    View Product
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    Grundfos GT Hot Water Expansion Tanks
    Vertical GT-U+ 500V (500L) 16bar Hot Water Expansion Tank - 99082710

    The GT-U+ tanks are steel pressure tanks with a replaceable, non-toxic butyl rubber bladder enclosed by compressed nitrogen, equipped with a Manometer and a connection…

    View Product
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    Grundfos GT Hot Water Expansion Tanks
    Vertical GT-U+ 750V (750L) 16bar Hot Water Expansion Tank - 99082711

    The GT-U+ tanks are steel pressure tanks with a replaceable, non-toxic butyl rubber bladder enclosed by compressed nitrogen, equipped with a Manometer and a connection…

    View Product
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    Grundfos GT Hot Water Expansion Tanks
    Vertical GT-U+ 1000V (1000L) 16bar Hot Water Expansion Tank - 99082712

    The GT-U+ tanks are steel pressure tanks with a replaceable, non-toxic butyl rubber bladder enclosed by compressed nitrogen, equipped with a Manometer and a connection…

    View Product
    Logo for Grundfos
    Grundfos GT Hot Water Expansion Tanks
    Vertical GT-U+ 1500V (1500L) 16bar Hot Water Expansion Tank - 99082713

    The GT-U+ tanks are steel pressure tanks with a replaceable, non-toxic butyl rubber bladder enclosed by compressed nitrogen, equipped with a Manometer and a connection…

    View Product
    Logo for Grundfos
    Grundfos GT Hot Water Expansion Tanks
    Vertical GT-U+ 2000V (2000L) 16bar Hot Water Expansion Tank - 99082714

    The GT-U+ tanks are steel pressure tanks with a replaceable, non-toxic butyl rubber bladder enclosed by compressed nitrogen, equipped with a Manometer and a connection…

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Frequently Asked Questions

Quick answers to common questions about the Grundfos GT Hot Water Expansion Tanks. For technical specifications, see the product details above; for sizing or installation advice, contact our team. If you have any other questions, we're happy to help.

What is an accumulator tank?

An accumulator tank is a pressurised vessel that connects directly to the mains supply and stores water under pressure. When a tap or shower opens, water discharges immediately from the vessel at full mains pressure rather than drawing only from the street main. This delivers stronger, more consistent flow at peak times. Accumulators have no pump and no moving parts so they are maintenance free and silent.

When should I use an accumulator instead of a pump?

An accumulator is the right solution when static mains pressure is adequate – above 2 bar – but flow is poor or drops during peak demand. It boosts available flow without adding a pump, energy use or noise. If static pressure is below 2 bar, a booster pump is needed instead, or an accumulator combined with a charge pump such as the WaterBoost ACF1.

What size accumulator do I need?

Accumulators are typically sized on a 60 per cent usable rule – a 300 litre vessel delivers around 180 litres of boosted water per cycle. As a guide, a 2 to 3 bedroom home suits a 300 litre vessel such as the GWS GCB-300LV. Larger 4 to 5 bedroom homes or properties with multiple bathrooms typically need 450 to 600 litres. Vertical models save floor space, horizontal models suit lofts and roof spaces.