Type of water pump

How do I know what size water pump I need I’d like to add one

You want to be more specific?

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Are you trying to replace your PWing pump? Do you want a pump to feed from your buffer to your PWer? :flushed:

Required HP = (gpm x psi) ÷ 1100
Equation is reversible to solve for psi or gpm…

That machine is no bigger than 4 gpm.