DIYbanter - View Single Post - Power/pressure washers: GPM & PSI

Some Guy

wrote:

I'm asking if the GPM and PSI numbers (and engine HP numbers)
can be trusted from one make/model to the next.

Not very. They both likely will have inflated their numbers.
This kind of misrepresentation is most common on consumer grade
tools than professional or industrial.

Can you cite any authoritative source that has done any sort of analysis
of several models of home, farm or light-commercial grade power washers
and has come to that conclusion or made that observation?

It's highly likely that what you say is true - just like the HP numbers
quoted for small gasoline engines have been in recent years. But I
would like to see something in print stating their observations or
measurements of these power washers.

Do you own or use any power washers?

I'm asking what are the minimum GPM, PSI and engine HP numbers
that make it worth while to buy and use these things.

It depends on what you want to use it on.

Would you buy a washer rated at 500 psi and 1 gpm? If not, why not?

Sort of like asking what the Towing capacity and the fuel tank
capacity is needed for for a car and not telling us what you
want to do with that car.

Even if I were to tell you, do you have the personal experience to know
how many GPM/PSI is needed to do task 1, task 2, task 3 and task 4? Are
you asking because if I tell you what task 1 is, you can tell me
authoritatively, specifically, how many gpm and PSI I need?

Would you tell you doctor you have a pain, and you want to
know what to do about it and refuse to tell him where the
pain is, or when you feel it?

Are you the doctor in this situation?

If I describe exactly what I want to clean, can YOU tell me the minimum
PSI and GPM I need?

Or do you just like answering a question with another question?