The Questions:

First of all, you need to work out the basics: whether you need a single or twin impeller, a positive or universal/negative head, and the pressure required.

What do you want to pump?

Hot and cold water (twin impeller)

Hot or cold water (single impeller)

Is the cold water tank above the outlet pipework?

Yes (positive head)

No (universal/negative head)

How many showers do you want to pump?

1

2+

What pressure is required?

1.4/5.0 bar

2.0 bar

3.0 bar

4.0 bar

Now that you’ve calculated your basic shower pump requirements, you need to think about budget, noise, warranty, reliability, quality, dimensions, and availability. It is also a good idea to list these in order of priority.

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