I recently replaced the pump head on my parch pump with the Chugger stainless steel pump head. Since doing so I have noticed that on occasion, specifically during a full rolling boil, the impeller will stop spinning. When it does this, it makes a really great screeching sound. I shut the pump off as quick as I can, ensure the head is flooded and turn it back on. Typically, it will work fine, and may or may not happen again.
I understand that a rolling boil can cause the pump to cavitate, and I have the ability to reduced the flow on the outlet side. The only thing is, I can’t ever remember this happening with the march pump head. Anyone have any ideas as to why it would happen with one and not the other?