HOW TO SPECIFY THE RIGHT ACCUMULATOR TANK
Monday, December 6 2021
AccuBoost Accumulator tanks offer a great solution to low mains water performance, however, with a range of tanks available, choosing the right accumulator for the job can seem like a complicated process. To help simplify the specification process we've explained the key steps to choosing the right accumulator tank.
1. Does the home have a combi boiler or an unvented system?
Accumulator tanks are suitable for both combi boilers and unvented systems. However, while all options are suitable for a combi boiler, a home with an unvented system requires a minimum of 300 or 450 litres capacity.
2. Pumped or unpumped?
A pumped tank should be specified in homes where any of the following apply -
- Water pressure below 2.0 bar
- Water flow below 12l/min
- Or, when the highest outlet is on the second floor or higher.
All of Salamander’s AccuBoost Accumulator tanks are available as both pumped and unpumped models, except for the 60L tank which is pumped only.
3. How to size an accumulator tank?
To specify what size accumulator tank a home needs, calculate the flow rate (l/min) of the outlets in the home that you want to run at any one time. You can then identify the correct accumulator tank sizing to provide this flow rate for a minimum of nine minutes - the average length of a shower.
As a rough guide, here is a breakdown of what pumped tanks can offer for nine minutes (after this they will then continue to offer at least 12l/min through the pump):
- 60L tank - up to 14l/min
- 120L tank - up to 16l/min
- 180L tank - up to 18l/min
- 300L tank - up to 30l/min
- 450L tank - up to 36l/min
Our product selector features an accumulator tank calculator which will determine, depending on the flow needed by the outlets in the system, what size accumulator tank is needed.
4. How much space is available?
In general, a 60L model will fit into a standard 500mm kitchen base unit; a 120L model into a 500mm larder style kitchen unit; and the 180L/300L model into a 600mm larder style kitchen unit with the back removed (although the tanks don’t have to be situated in the kitchen).
If space is limited, you may need to specify a smaller tank, which would mean running fewer outlets simultaneously. However, an alternative option would be to link multiple tanks together to gain additional capacity and make the solution flexible to the available space.
5. Still unsure?
If you’re still unsure which accumulator tank is right for your needs, Salamander Pumps has an easy-to-use online product selector tool to identify which tank is best suited to the job in hand.
Salamander Pumps’ product selector tool is available here: https://www.salamanderpumps.co.uk/product-selector.php