I've turned off the stopcock on the metal connector valve below big plastic nut under the cistern and felt around for exact location of leak.

It seems to be coming from under the plastic nut connecting to the ballcock pipe inside the cistern.

Is this easily remedied?

PS About a year ago, as a float, had round ballcock and arm replaced by little upside-down cup thingy (mentioned in case had some kind of bearing on it)

Thanks for any advice

Delboy, February 2008

their is a rubber seal inside yes.

hi-spec plumbing & heating, February 2008

Blimey!! That was quick. Thanks.

Flush to drain cistern.

Undo plastic nut and top nut of valve

pull out 'ballcock' pipe?

Is there a rubber washer/seal under this pipe inside the cistern?

Delboy, February 2008

fit new seal and check for tightness

hi-spec plumbing & heating, February 2008