[PSUBS-MAILIST] Re: Blowing ballast (was: question about general design?)

["Michael B. Holt" <mholt@richmond.edu>]

SFreihof@aol.com wrote:
> 
> Another option is to head to your local welding supply.  You can get
> industrial type tanks with compressed air.

Thanks.  I hadn't thought of that.  What is compressed air used for
in welding?



Mike