This S80x6 adapter must be screwed directly onto the thread of your barrels. Without the original valve. Only for Mauser (Hoover) Repaltainer IBC containers. Only PE-HD (HDPE) manufactured adapters with a Microzote ® (PVDF) incorporated seal. If you are in any doubt about the right screw thread, email photos of your valve/bottle to email@example.com We will be happy to assist you.