Hi zheilwane,

Recently I went to inquire about Grundfos water pump and was recommended 2 options. I do not know the model but i think it should be similar to the ones you recommended.

The first option has higher pressure but smaller inlet. Hence can support up to 4 bathrooms only.

The second option has lower pressure but bigger outlet and hence can support up to 6 bathrooms.

I am a little confused here. If the 2nd pump has lower pressure, how can it support more taps/showers even though it has higher flow rate? Surely the pressure would reduced if there are more people using the shower/tabs?

Which is a better option? I have 6 bathrooms but i doubt all will be used at the same time.