What is a cold water accumulator?

The accumulator boosts the flow rate available to hot and cold water taps by storing water in a membrane diaphragm. The accumulator then delivers this water to the cylinder and cold outlets when demand exceeds the mains flow rate available.
 

Can an accumulator increase water pressure?

Accumulators will not increase water pressure higher than your incoming mains pressure. They simply allow the water system to work at its optimum pressure capacity by supplementing the flow of water when the system has open outlets (i.e. the tap is running). When the outlets are closed, the accumulator shuts off this additional flow until it is required again. The addition of an accumulator pump will provide boosted pressure to a maximum flow of 12 lpm.  

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