Here is Bella's advice:
Hi
I have viewed your video. This is quite easy to fix. You hold the tap body with an adjustable spanner and undo the nut behind the tap handle, you will need to unscrew tap as you are undoing it. Wipe out inside tap body. On the end of thetap shaft is a rubber seal, get a pin and remove it then turn it over this will give it a new lease of life.
Thanks
Chris
*
Kind Regards,
Jordan Miller*
Bella Barista – Passionate About Coffee

