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Grundfos accumulator Vessels

300 litre accumulator vertical Grundfos GT-D-300-V 96528347

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Our Price £577.20 Inc VAT £481.00 Ex VAT
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  • Established 1975
  • Trusted by thousands of customers

Grundfos GT-D-300 PN10  Double Diaphragm Accumulator Tank

The Grundfos GT-D-300 PN10 G1 1/4 V is a robust and efficient vertical pressure tank designed for reliable operation in water supply systems. With a capacity of 300 litres, this tank is ideal for managing water pressure and enhancing system performance in various applications.

Water pressure and flow can fluctuate, especially during peak usage times such as mornings and evenings, leading to reduced mains pressure. Accumulators address this issue by storing water under static or resting pressure, ensuring a more consistent supply.

Even if mains pressure is sufficient, the design and condition of the plumbing—particularly the pipes connecting your home to the mains—can significantly reduce both pressure and flow by the time the water reaches your taps. Accumulators help mitigate these challenges, delivering reliable water performance.

Key Features:

  • Capacity: 300 litres
  • Installation: Vertical
  • Material: Steel construction with a chlorine-resistant 100% butyl diaphragm
  • Liner: Precision-molded copolymer polypropylene liner ensures superior air and water separation
  • Pressure Rating: Maximum operating pressure of 10 bar
  • Temperature Tolerance: Suitable for liquid temperatures up to 90°C
  • Approvals: Certified for drinking water use

Benefits:

  • Pressure Control: Maintains consistent pressure in the water supply, reducing pump start/stop cycles during low water usage or minor leakages.
  • Comfort and Efficiency: Enhances system comfort by compensating for pressure drops when taps are opened and reducing water hammer issues in the pipework.
  • Durability: Double diaphragm design provides extended reliability and resistance to wear over time.

Applications:

  • Ideal for water supply systems in residential, commercial, or industrial settings.
  • Suitable for installations requiring drinking water certification.

The Grundfos GT-D-300 PN10 G1 1/4 V is a high-quality pressure tank engineered for reliability, comfort, and efficiency in water management systems.

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Frequently Asked Questions

Quick answers to common questions about the 300 litre accumulator vertical Grundfos GT-D-300-V 96528347. 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 a mains pressure boosting system?

A mains pressure boosting system increases the pressure and flow of water from the incoming mains supply into a property. It typically combines a pump and a storage or expansion tank, drawing water from the mains and delivering it to taps, showers and appliances at a stronger, more consistent pressure. They are used where the incoming mains is too weak to serve modern outlets reliably.

When do I need a mains booster pump?

You normally need a mains booster if static mains pressure is below 1.5 to 2 bar, if showers run weakly when other taps are open, or if combi boilers struggle to deliver hot water. Anglian Pumping recommends checking static pressure at the stop tap before specifying a system, then choosing a model rated for the number of bathrooms and outlets in the property.

What size mains booster do I need for my home?

Sizing depends on the number of bathrooms, the type of fittings and the static mains pressure. As a guide, a 1 to 2 bathroom property with combi boiler or single shower often needs 1.6 to 3 bar boost. A 2 to 3 bathroom property typically needs 3 to 4.5 bar with an integral break tank. Larger homes need a tank-and-pump system such as the DAB Esybox with Esytank or a Powertank set.

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.