Inquiry (采购产品): tank Question I am working one of your custom built double wall above ground tank for Raytheon antarctic services and one of the two 6" vents is only a threaded bung welded to the tank. the second 6" vent is open like it should be to the main tank. Everything else is fine. A nice tank . Should the vent in question be for the interstitial space? Serial 0058-23-01-S0195 Model C26202 **** Hidden Message ***** john havlik 0000000 ATA Company: raytheon polar E-mail: havlikjo@usap.gov **** Hidden Message ***** havlikjo@usap.gov