Depends where it is leaking from. If it is leaking from the part that screws on to the tap, try new rubber seals. These can be bought from any plumbers shop or hardware store. If leaking from where the hose is clamped on to the connection piece then buy a new hose.
Lincoln Appliance NZ
September 2009
If it's leaking from the threads try using teflon tape. That can be found at any hardwear store.
carter
September 2009
I can answer this question...
Hw do I keep the hose that attach to the back of the washer from leaking?