The other week I needed an outlet for pumps and needed them there an then, scratched me head coz no we're had anything.
I have now got quite a few plastic spares but on that particular day I didn't.
On an external garden ta say, you have the screw thread that most of us put a tap nipple on, but u can also buy one that is the hose pushes onto rather the having a connection, use a dubilee clip, it comes with a reducer and fits perfect onto the shurflo pump
If you don't understand wot I mean al go get one out the van an post pic, these can be picked up from any diy store