New fill station differences??

[mcc1961]

I ordered a new fill station for my 3450psi scuba tank and after I filled the gun from 2000psi to 3000psi about 8 times the new fill station read over 4000psi reversed filling the scuba up.I hooked the old fill station pumping the air in the tank it read about 3100psi.Could the new fill station be off that much?

[BigTinBoat]

I ordered a new fill station for my 3450psi scuba tank and after I filled the gun from 2000psi to 3000psi about 8 times the new fill station read over 4000psi reversed filling the scuba up.I hooked the old fill station pumping the air in the tank it read about 3100psi.Could the new fill station be off that much?

Is it a liquid fill Wika gauge? or a Dry Chinese one? That would make a difference

[rsterne]

The gauge is likely going south.... cheap gauges don't last.... nor are they accurate....

Bob