Pipe that goes into cistern is leaking - help!

[redrabbit]

There is a copper pipe that has a nut which screws into the plastic ballcock arm thing.

I unscrewed the copper bit and could see the washer was wasted away.

I have replaced that but it's not helped. If anything the leak is worse. It's very difficult to see where the water is coming from.

A friend asked if I'd replaced the plastic pipe and ballcock arm. But I haven't. It looks in good condition and I'm not sure what would help.

Any thoughts?

 

[Dan Robinson]

There is not enough plastic thread coming through the cistern.

 

[redrabbit]

There is not enough plastic thread coming through the cistern.

Sorry should have explained. I loosened it off. There's a good inch at least when it's properly poking through

 

[terryplumb]

Examine the end of the plastic thread ,the surface that comes into contact with the red fibre seal. It should be nice and flat. Also check the thread for damage ,it can quite easily be cross threaded when tightening up the brass nut . when you put it back together dont overtighten the brass nut. If in doubt fit a new float valve with a brass tail.

 

[redrabbit]

Examine the end of the plastic thread ,the surface that comes into contact with the red fibre seal. It should be nice and flat. Also check the thread for damage ,it can quite easily be cross threaded when tightening up the brass nut . when you put it back together dont overtighten the brass nut. If in doubt fit a new float valve with a brass tail.

I FIXED IT!!!!!

Unbelievable, one of my greatest ever achievements (But seriously, it is pretty impressive considering how bad I am with anything DIY related).

Thanks for the suggestion of the "brass tail". I bought one earlier from screwfix, and that seems to have fixed the issue!

 

[dilalio]

Plastic threads on bottom entry fill valves
Almost as bad as saniflo's

 

[terryplumb]

Plastic threads on bottom entry fill valves
Almost as bad as saniflo's

Plastic threads on side entry fill valves are just as bad !!!

 

[dilalio]

Plastic threads on side entry fill valves are just as bad !!!

Least you don't have to empty the cistern to change them