Built-in Cistern "overflowing"

[fisherpl]

Hi,

I've searched on here but this seems an odd one. I have an Oliver International built-in cistern on which the internal overflow initially appeared to be running.

However, on examination the float valve is operating correctly and it appears that there is a leak into the delivery tube to the WC pan from the bulk water in the cistern. I think this because the "overflow" runs even with the cistern almost empty and water supply shut off.

I can't see any obvoius method of removing the syphon assembly to check the body for cracks or other sealing issues without demolishing the bathroom wall! Any thoughts?

 

[muggles]

Difficult to comment on your individual installation with regards to access without seeing it but generally the flush valve (assuming you've got a push-button flush rather than a handle) is on a bayonet fitting and should rotate and snap out. As for which direction it rotates, that varies according to valve manufacturer unfortunately, and some use a push-on clip system rather than a bayonet too just to add to the complication.

Your problem is most likely a failed flush valve washer, you'll need to get the valve out to confirm though