If you’re suffering with a low hot or cold pressure on your domestic water system then you really need to get yourself a Salamander Single Impeller Shower Pump fitted. They’re engineered to boost either the hot or cold supply so the pressure of both hot and cold are equal at the outlet. We split our single impeller Salamander pumps into two sections, up to 2.0 bar and over 2.0 bar. We do this because the bar pressure will relate to how much of a boost you need. Up to 2.0 bar will give you a small to medium increase while over 2.0 bar will be quite a substantial increase.