help choosing correct pump for heating system

[hackep1]

Hello,
I need to replace the pump in my central heating, my current pump is a grundfos 15-50, I have decided upon a grundfos alpha+. They do a 15-50 and a 15-60, I guess I want the 15-50 again but what is the differance? The specs for flow rate and power consumption are the same.

Any advice would be of great help

 

[Deleted member 105431]

a 15/50 is a 5m head pump, a 15/60 is a 6m head pump. If your heating worked fine with the old 15/50 then fit another 15/50.