Hi Alex, new to this equipment and not up to date on fitting names. It's the valve on the backpack that has a slight leak, however when I connect to pole and turn tap off on the pole, the leak becomes a spray under pressure. If it was an ordinary plumbing compression fitting then I'd know just to nip it up, but not sure what to do on this type of fitting. If memory serves me right, it is male to female connection. I can email my details tomorrow if that makes it easier, and then you'd know what I purchased.