Anyone know if all overflow valves are created equal?

OR, how about a Cummins Part #.

The reason I ask is that some of the tractors we sell used the 6B5.9, and I would like to know if you guys think that overflow valve would work.

I can get one for about $15.00.

Thanks,
Chris

 

Overflow valves come rated at several different pressures, most are close enough to what is required in our trucks to work just fine.