Omega 18 from AOA

Contacted AOA, they said if the dead head shows 2500 on the tank then my compressor isnt filling to 4500 psi. I told him it fills all my guns to the correct psi though. He said the gauge must be wrong . Si i disconnected the harness on my compressors gauge so it doesn't stop at 4500 just to see if i can get more air into my omega, well my burst disc gave out. So this tells me my fricken compressor was correct and the omegas gauge is wrong. Am i right? 
 
Yes it wont fill my guns past 2500 psi either.


Ok. So you hook up the compressor (to the fill hose) and fill the tank. I'm guess both the tank gauge (fill assembly) and compressor gauge both climb in pressure together?

Then does the tank gauge just stop at 2500 and the compressor gauge keep going to 4500?

I'm guessing this is the tank you have?



https://www.airgunsofarizona.com/air-cylinders/omega-18-cu.-ft.-4500-psi-portable-air-tank/



If not please attach a pic of your tank with it attached to the compressor.
 
Thats the one i got, AOA said it nit a regulated tank. They both climb exactly to 4500 psi then the compressor shuts off.


So then you shut off tank and compressor, and then bleed valve? Then connect the dead head and open valve and gauge only goes to 2500psi? If so that sounds super strange and I would return tank for exchange.