The Atkinson dry break couping for ADBLUE is designed to open and close automatically when the delivery hose is connected and disconnected. The valve insures minimum liquid loss on disconnection even if connected or disconnected whilst filling is in progress 2" BSPP Female Thread 316 Stainless Steel EPDM Seal Working Pressure 10 Bar For tanks up to 10,000 Litre The Atkinson DBC-1000-AB was designed and manufactured in Westbury, England and is 100% Tested before shipment. Atkinson Equipment is an ISO Quality Assured Firm. Using the Atkinson Dry-Break Coupling minimizes the possiblility of contamination.