Help with leaking toilet pipe

[plumworld]

Can anyone with identifying the issue with thisleak? The toilet inlet pipe is leakingfrom the metal bolt that attaches to the plastic part of the toilet (seephoto). I initially tried to tighten themetal nut but cracked the bottom entry ball valve plasticpipe. Anyway, I have now replaced theentry ball valve pipe but it is still leaking. Therefore the issue lies with the isolating valve.

Does these normally fail? Do theyhave an o ring inside or anything else that could fail? I look at the existing one but there did notappear to anything in it. Also, whattype of isolating valve is this one? Ilook at the 15mm one in B&Q but they seem to be smaller and do not reachthe plastic pipe.

Thanks for your replies in advance.

 

[SimonG]

Its a service valve. Your issue was probably the fibre washer between the plastic and valve. Literally a five minute fix. Or was.

 

[MarkAqua]

is it leaking from the little flat head screw in the middle of the valve?

 

[plumworld]

Thanks for replying. It is not leaking from the screw. It is leaking from the top nut (see new pic). It leaks from both the top of the nut and bottom of the same nut.

Is the service valve the same as an isolating valve? What size do I need? Do I even need to change the piece at all?

 

[SimonG]

Fibre washer.

 

[plumbandplumber]

1/2"

 

[Dotty]

These plus spares.

Plumbsure Fibre Washer, Pack of 10 | Departments | DIY at B&Q

 

[plumworld]

Thank you to all for your help. I have got the washers and will fit one tomorrow. Will let you know if that solves the leak.

 

[State of Flux]

If not, you may have a small cross-thread as the plastic is easily damaged by the metal. Take care when refitting

 

[plumworld]

The fibre washer seems to have sorted the leak - will check again later. Thanks again.

 

[Duker996]

If not, you may have a small cross-thread as the plastic is easily damaged by the metal. Take care when refitting

A lot to be said for the ball valves with metal threads!