Glass "water" carboy

[argodzilla]

I have a local kitchen store selling glass "water" 5 gallon carboy for $33. It says do not pressurize. This is designed for use with water on the box.
I am wondering if it could be used as a secondary. Anyone have a reason why not?

Thanks!

 

[amandabab]

all of the new ones say water on the box, none of them are designed to hold pressure. Its a standard glass carboy.

 

[TrainSafe]

We don't have any pressure in carboys, so they should be fine.

 

[Kirch3333]

The airlock relieves the pressure of the co2 formed inside of the carboy during fermentation so there's no excessive pressure.