Accumulator Vessels
Order today and experience a powerful taps again.
Upstream Kits -
12 products
Cold water accumulator vessels. Maintenance free and WRAS approved. Diaphragm design Patened stainless steel water connection Virgin polypropylene liner Condensation reducing design Two-part polyurethane, epoxy…
Accumulators – Low Water Flow Applications Water pressure and flow is not constant and demand during busy morning and evening periods may reduce water pressure…
Accumulators – Low Water Flow Applications Water pressure and flow is not constant and demand during busy morning and evening periods may reduce water pressure…
Accumulators – Low Water Flow Applications Accumulators are an effective solution for combating inconsistent water pressure and flow, especially during high-demand periods such as busy…
Accumulators – Low Water Flow Applications Water pressure and flow is not constant and demand during busy morning and evening periods may reduce water pressure…
Accumulators – Solutions for Low Water Flow Applications Water pressure and flow can fluctuate, especially during peak usage times such as mornings and evenings, leading…
The GWS GCB-200LV is a 200-litre WRAS-approved vertical accumulator vessel for mains-connected water systems. Accumulators store mains water under pressure — so when you open…
The GWS GCB-250LV is a 250-litre WRAS-approved vertical accumulator vessel for mains-connected water systems. Accumulators store mains water under pressure — so when you open…
The GWS GCB-300LV is a 300-litre WRAS-approved vertical accumulator vessel for mains-connected water systems. Accumulators store mains water under pressure — so when you open…
The GWS GCB-325LV is a 325-litre WRAS-approved vertical accumulator vessel for mains-connected water systems. Accumulators store mains water under pressure — so when you open…
The GWS GCB-450LV is a 450-litre WRAS-approved vertical accumulator vessel for mains-connected water systems. Accumulators store mains water under pressure — so when you open…
Accumulator vessel connection kit to 22mm copper pipe. Including 1 1/2" socket, 1 1/2" x " bush, 22mm x 1" elbow, 1/2" cap. Accumulator technology…
Frequently Asked Questions
Quick answers to common questions about the Accumulator Vessels. 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.