Recommended this pump

[Infinity]

Replacing 4/4 pump...on a budget

If I were in your shoes, I’d take a look at this: At 5gpm, you should be able to push 3000 psi or close to it at the pump, giving you adequate pressure at the surface cleaner for residential flatwork, at least. Use less hose and/or remove your injector for a little more oomph if needed. Just verify that it will bolt onto your engine ok.