Accumulator Vessels – Composite
GWS 300 litre Composite Accumulator C2B-300LV
- Established 1975
- Trusted by thousands of customers
GWS C2Lite CAD™ Composite Vessels
Offering a lightweight composite solution with proven performance, the C2Lite CAD™ series has been designed with the patented controlled action diaphragm designs of GWS Challenger™ tanks.
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.
What sets the C2Lite CAD™ apart from other composite tanks, is that it doesn’t hide tired old bag technology in a plastic shell; the patented CAD2 diaphragm design is considerably stronger and will not crease or deteriorate. The C2Lite CAD™ features a chlorine resistant 100% butyl diaphragm with precision molded copolymer polypropylene liner for superior air and water separation. The patented design allows each size tank to offer a properly sized water chamber matched to the drawdown performance of the tank.
Easy to install, weather resistant and engineered to withstand extreme environmental conditions, the C2Lite CAD™ design cannot be beaten when it comes to performance and durability and are the best quality composite vessels available today.
As with all GWS products C2Lite CAD™ tanks are quality tested throughout the production process to ensure their structural integrity.
More about this product
LIGHTWEIGHT MAINTENANCE FREE PRESSURE TANKS
C2Lite CAD™ Series
- Capacity: 60 – 450 liter / 15 – 120 gallon
- Maximum working pressure: 8.6 bar / 125 psi
- Pre-charge: 1.4 bar / 20 psi
- Maximum operating temperature: 49° C / 120° F
The C2Lite CAD™ series is ideally suited to a wide range of applications including:
- Booster systems
- Well systems
- Irrigation systems
- Hydraulic hammer arresting
- Clean water backwash for Ultra-Filtration systems
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manual JPEGDownload
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data sheet PDFDownload
Standard delivery:
Standard delivery is free on most orders. Some items may incur a delivery charge depending on weight, size or value. Any applicable charge will be displayed at checkout.
Deliveries will typically be made between 7am and 6pm, Monday to Friday (excluding public holidays).
Next day delivery:
Next working day delivery is available for a £16.50 + VAT delivery charge.
Orders must be placed before 12 noon to qualify for next working day delivery. Orders placed after 12 noon on Thursday but before noon on Friday will be delivered the following Monday. Orders placed after 12 noon on Friday will be delivered on Tuesday.
Pallet/Large/Difficult items:
Some large, heavy or difficult to transport items may incur an additional delivery charge. Please contact us for a delivery quote before ordering.
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Frequently Asked Questions
Quick answers to common questions about the GWS 300 litre Composite Accumulator C2B-300LV. 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.