Another thought...I took two tanks to be refilled. The gentleman said he couldn't fill them because they were "out of date" that time & money he could fix. I know there will be paranoid folks here that want to warn me but life's a turkey shoot. Ya' pays yer money & takes yer chances. I'm not one to prescribe to the sky is falling syndrome...My old newly full tanks work just fine that were filled by vendor that didn't care weather I got blown up or not.. :)... The first vendor may of mentioned that an old tank could cause cancer in California but I wasn't paying attention.. :)