IRL - I gave my strapped computer a 'dangly participle' - Once through water cooler
This is an example of a domestic water supplied once through water cooling system... I have no idea what the kW rating is... maybe 50kW? about 170,000BTU? You work it out, 1/2' main, about 60psi. I hate imperial... and no, you didn't go to the moon on imperial, you did it with SI than converted for the morons...