Continuous flushing toilet

[yottie]

Now and again the toilet continues to flush. Could this be just a lime-scale build up or other, installed in 1971.

 

[wingcoax]

I would think, that after all those years, the poor old siphon is ready to retire.

 

[buck51]

dont think it will be a syphon, but not enough info given in OP,

 

[buck51]

flush valve not shutting off, or internal over flow maybe.

A continuous flush is imposible, unless the flush pipe is partly blocked, and the you get a steady trickle into the pan

 

[yottie]

Sorry, meant to say a steady trickle into the pan. I can stop it by "jiggling"
the lever to the syphon

 

[buck51]

are you sure its a syphon???

 

[yottie]

I hope I've got the name correct, it's the blue plastic part with an attachment to the flush lever, goes up and down (name on top FORDHAM made in England)
Have just had another try and I notice the adjustment bar attched to the flushing lever could be catching on the side of the ceramic tank ? (could cut 1" off ?)

 

[buck51]

A picture paints a thousand words,

A syphon would not cause it to trickle

 

[Charnwood]

A syphon would not cause it to trickle

Unless the inlet valve was continuously letting by.
Syphons 'whoosh' not trickle. There has to be a secondary cause for there to be a trickle through a syphon.

A syphon:

 

[kbdiy]

If the lever is sticking in the down position (as if it is flushing) and the water feed to the cistern is powerful enough then it will continue to flush (trickle) as the syphon action isn't broken due to the influx of water to refill.

Had recent experience of this very same problem - the clue is that the OP can cure it by 'jiggling' the flush lever. Limescale build up is the root cause as the lever doesn't return to the rest position.

 

[yottie]

Thanks for that, your pic is the one I have. As I mentioned before I thought the brass connecting bar seemed very close to the edge of the tank, have taken it out this morning, cut 1" from portruding end, cleaned green stuff from hole and generally tidied it up. Flushed a couple of times and is OK up to now, I wondered if the fitting had "drifted" a little over the (40) years and just wanted retuning !