Why intentionally cavitate the pump? It's better to pump against a closed valve for a few seconds, check the steamer cap with an IR thermometer to see how hot it gets, them pump the hot water back into the booster tank.
Then repeat until the water is warm, then use it to supply the decon water.
That runs less risk of damaging a lot of pumps than intentional cavitation.
Cavitation can damage the pump to the point where it's unusable.
Impeller damaged by corrosion plus cavitation (any pump that uses chlorinated water, flouridated water, or salt water, or that is exposed to salt air)