Taking a shower is very much part of our daily lives and their continuing popularity can be attributed to speed, immediacy, cleanliness and convenience. They are also perceived as wasting less water – although this is not necessarily true, as when it comes to power showers they use water at a rate of between twenty and fifty litres a minute.
Industry forecasts still show that this market will continue to increase, although today due to the large installed base, the new vs replacement split has swung in favour of replacement.
Selecting or replacing a shower pump
Help to make the right choice is at hand as Grundfos have a great online pump selector tool that will guide you through the selection process. This explains that whether the requirement is for a new shower pump or to replace an existing one, the first thing that needs to be established is, what is the demand. This is done by working out the number of people who will be using the shower, as well as the frequency of use.
The next step to consider is if the system needs a positive or negative head. A negative head is required where the flow from the outlet is less than 0.5 litre/min. This is usually when there is insufficient pressure, under gravity, to provide a flow at the outlet. A positive head is required where the flow from the outlet is more than 0.5 litre/min. This is usually when there is sufficient pressure, under gravity, to provide a flow at the outlet. In terms of pump performance.
Then you need to establish the pressure needs. In terms of bar rating a 1.0 bar is generally considered low pressure, 1.5-2.0 bar medium pressure and ≥3.0 bar high pressure, for example to run multiple showers/heads.