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An AccuBoost accumulator must be installed in a dry location, protected from temperatures below 4°C and greater than 35°C, such as a kitchen cupboard, garage, loft space or outbuilding.

The vessel within the accumulator vessel is rated up to a maximum of 8.6 bar, therefore, to ensure safety and minimise damage a pressure limiting device must be installed, this is included with AccuBoost accumulators.

For the best performance we advise that the tank is installed as close as possible to the pump, which must be installed within 5m of the point of entry for the mains water,  however there is no maximum distance between the tank and pump.

An accumulator stores water at pressure. In an AccuBoost accumulator installation the water in the system is stored at the peak mains pressure.

A non-return valve (NRV) ensures that the built-up pressure in AccuBoost install is locked into the system. Without an NRV the system pressure would fluctuate with the mains pressure.

The NRV also prevents water in the system from flowing back into the mains supply.

An AccuBoost accumulator stores both air and water within the vessel. The accumulator’s capacity is shared 50% air and 50% water, therefore a 450L accumulator will store approximately 226.5 litres of water.

The volume of water stored in the accumulator will vary depending on the pre-charge pressure held in the bladder of the vessel.

An AccuBoost accumulator vessel can be installed in a system with an incoming mains pipe in any material.

If the system has a high pressure (over 2.0 bar) but has a restricted main, then AccuBoost accumulator may still offer a solution – contact us for more information.

A sign of a restricted mains supply pipe would be a high standing pressure and low flow rate.

Yes, more than one accumulator can be installed into a system. Installing multiple accumulator tanks creates a greater stored water capacity and a higher flow rate (L/min).

AccuBoost accumulator systems have no maximum stored water capacity, however, please ensure adequate water turnover to prevent water stagnation.

In systems with a natural mains flow rate below 12L/min the water vessel will take a long time to fill, installing a pump will ensure that the vessel will be filled more quickly.

The pre-charge pressure is the air pressure stored within the bladder of the vessel. The air in the vessel is compressed by the water pressure, which pushes the extra volume of water out of the vessel. AccuBoost accumulators require that the pre-charge pressure is 1.5 bar less than the pressure of the incoming mains.

In AccuBoost accumulator installations, the minimum pressure of the mains must be 2.0 bar so that the vessel can be set to 1.5 bar below (0.5 bar). If the vessel is set to 0 bar then the positive impact of the accumulator is negated.

An accumulator vessel is a pressurised vessel. To allow the incoming mains water to be able to force water into the vessel, the pressure within the vessel must be lower than the pressure of the incoming mains.

For AccuBoost accumulators, the pressure within the vessel should be 1.5 bar below the pressure of the incoming mains. This size of pressure difference ensures that the incoming mains can fill the vessel and that there is enough pressure to force the water out of the vessel and to the outlet.

In AccuBoost accumulator installations, the minimum pressure of the mains must be 2.0 bar so that the vessel can be set to 1.5 bar below (0.5 bar). If the vessel is set to 0 bar then the positive impact of the accumulator is negated.

If you’re following on from our FAQ ‘Why is the pump on the accumulator running on/won’t turn off?’, you need to open the isolation valves on the outlet hoses and the tank connector hose before carrying out these steps.

To check the pre-charge pressure, first drain the tank, then close the inlet.

Next open all outlets in the property until no more water is comes out or it trickles out. Remove the black cap on the top of the vessel, revealing the Schrader valve. Place a pump with a pressure gauge, such as a bicycle pump, on the Schrader valve and check the pressure. If the pressure is less than 1.5 bar, increase it to 1.5 bar using the pump. If it is already 1.5 bar, contact Salamander Pumps.

An accumulator tank stores water under pressure to provide an excellent solution for properties requiring additional boost to mains water flow and pressure