I learned a few things about air pressure regulators today

[Pen & Wrench]

I noticed the pressure regulator started leaking, attached to my Quincy 60 gallon air compressor. I replaced it with another Rapid Air regulator, except the only one available locally has 3/4" fittings, so I bushed it down to my half inch fittings and hoses. When I took the old one apart, I now see that I could have bought a new diaphragm from JMC Equipment, but the new one is installed, so I guess that's water under the bridge. It appears like the original diaphragm in the Rapid Air 93216 regulator may have been a bit out of round, or maybe it just got that way with wear, not sure about that. Does it make any sense to repair the old regulator and keep it to replace the one I installed today if and when it fails, which could be 5 or more years from now?

 

[The Cobbler]

I've actually stripped apart a regulator to repair a leaking regulator specific to a compressor ( built in to the manifold) .
depending on cost of the part, I would probably repair what you have

 

[RTM]

If you can get the diaphragm, and not lose the regulator before it gets there, or in the next 10 years before it fails.... I'd do it

 

[johninct]

Throw both of your regulators away, Your air tools will work a lot better.