Brian Custer
New member
Hey guys....Thinking about switching my 4.0gpm pump out for the 5.6gpm on a pressure pro GX390 13 horse Honda 4200psi. I've researched the swap a bunch and have found I can successfully make the upgrade and run at about 2500 psi and 5.6 gpm. My question is for this unit is the loss of psi worth the gpm? I do use this machine primarily for house washes, but also sometimes for surface cleaning. I know the gpm is where the power is, I'm just concerned about dropping the psi so drastically on concrete. What you think?
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