Pump on or off during boil?

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Sprocker

Sprocker

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Doing my first all grain with Brewzilla Gen4 tomorrow.
Only thing I'm unsure about is...do I re-circulate or whirlpool during the boil phase? Or should the pump be off?
 
Pump off during boil but do turn it on for the last 10 mins to sanitise either a chiller or a whirlpool arm. I then keep it on through the chilling or whirlpool phases.
 
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