I just bought a new Impco Model J Regulator. Upon inspection of the old one vs the new one; the old one has W.C..2 LBS embossed on it whereas the new one has W.C. 0.08 LBS embossed on it.

Would there be an issue in using a regulator with a different pressure rating?

I cannot seem to readily find an Impco Model J with 0.2 LBS Water Column (Aka Red Spring)....

Thank you!