eli5: If water is non-compressible, then why not use it in hydraulic machines instead of hydraulic oil?

Question

eli5: If water is non-compressible, then why not use it in hydraulic machines instead of hydraulic oil?

In: 1817

Answer 1

Valves in water systems use water as a working fluid in hydraulic cylinders all the time. It helps when you don’t care about minor leakage and have a relatively infinite supply