Outside tap not working.

[Garreeee]

Hi all I'm having an issue with my outside tap not working, the tiniest of dribbles comes put each time I try it. Ive changed the tap to no avail so thinking I should change the stopcock tap thing under the sink?
Please see attached photos.
Many thanks for and advice.

Cheers

Gary

 

[ShaunCorbs]

Nrv probably stuck so needs to be replace eg right of the stop tap

 

[Garreeee]

This part here? Thank you much appreciated.

 

[ShaunCorbs]

Yep single check valve

 

[Garreeee]

Yep single check valve

Thank you!

 

[Garreeee]

Yep single check valve

Job done tap working, thank you very much for the advice!