"post flush drips"......................

[WaterTight]

Put new fill and flush valve in two WC's. Done this job many hundreds of times, never have any callbacks. One toilet fine, the other one has like annoying infrequent drip, drip from inside the pan. I checked the flush seal, sealing surface inside cradle nice and smooth, tried a new valve in original cradle even though doubted this was an issue. Still happens.

My guess is the internal pathways the flushing water comes through has some sort of obstruction/deposit/scale somewhere so that some water from the flush is being slowed down on it's way through. They say it mainly gets noticed happening in the hour or so after a flush and when not been used for while it's not happening. Seems to support my theory.

Any tips/tricks for this? Or is it new loo time?

Thanks

 

[snowhead]

If these are close coupled then the flush valve might have a slight leak in the seal against the cistern??

 

[WaterTight]

Then the drip would be constant. And I don't muck these up, always clean the surface with abrasive strips then wipe, smear of lsx, tighten it centrally and sufficiently. I might take it apart and put it back together just to rule it out for them I guess.

 

[WaterTight]

Oh, forgot to mention it was doing the same thing before I put in the new valves too. Could've been the old flush valve letting by but again same pattern, periodic rather than constant, worse for period following flushing. Not classic letting by running down back of pan, just solitary drip, water-torture stylee.