Originally Posted by pieper
why cant I regulate the flow by the valves on the kettles?
from the kettles are usually going into the input
of the pump. You do not regulate the input of these pumps. Doing so will usually result in cavitation of the pump head and you would have issues with air, priming and no flow. These magnetic head pumps are designed to regulate at the output as the shaft is not directly coupled to the impeller...
Ideally, you want a full .5" of unrestricted flow to the input as these pumps are .5" heads... What happens after that, the pump does not care...