When looking at booster pumps, you'll notice that they're listed with a pressure rating e.g. 1 bar booster pumps. Below is a list of common booster pump sizes and a description of when they should be used.
● 1 bar booster pumps - A 1 bar booster pump is ideal for small shower heads.
● 1.5 bar booster pumps - A 1.5 bar booster pump is best suited to normal showers needing more pressure.
● 2 bar booster pumps - A 2 bar booster pump is also best for low pressure showers.
● 2.5 bar booster pumps - A 2.5 bar booster pump will be required for power showers and larger shower heads, where a larger flow of water at high pressure is needed.
● 3 bar booster pumps - A 3 bar booster pump will be required for power showers and larger shower heads, where a larger flow of water is needed. Some showers have body jets and also require higher rates of water pressure which can be handled by 3 bar booster pumps and larger sizes.
There are more bar sizes such as 1.8 bar booster pumps and 4 bar booster pumps for example, although the list above can also be referred to with these sizes as a rough idea of what they're best used for. For example, a 1.8 bar booster pump will be be the perfect in between option for 1.5 bar and 2 bar booster pumps.
Once you know which booster pump bar size is required, it's time to choose the flow rate, commonly known as performance, you need from your pump.
Booster pump flow rate explained
A booster pump is designed to increase the water pressure in your pipes, but when it comes to performance that isn't the only thing you need to look for. Each booster pump will have its own flow rate, which is the amount of litres per minute it can pump out at the given pressure.
Remember the calculation we learned earlier in the 'How to check water pressure like pro' section?
This performance is important when factoring in cost. A higher-priced booster pump may produce the same 3 bar pressure as a cheaper alternative, yet produce a much higher flow rate. The cheaper 3 bar booster pump may be able to increase the pressure of the water equally as good, but it can't produce as much of that high-pressure water as the more expensive pump per minute. This could cause issues with a power shower for example, which requires a large volume of water per minute to operate at its best. When choosing the best booster pump for your needs, the flow rate is also important to know.
Once you know what sort of performance you're looking for, it's time to choose the type of pump you need.
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