I had to replace the syphon in the close coupled wc and now I can't stop the
damn thing from leaking. I have fitted a new rubber bung so what is the
knack for getting the thing to seal properly. The next step will be copious
amounts of sealer but I dont see that it should need that.
It is a modern cistern, about 6 years old. It is leaking between the cistern
and the pan so I assume it is leaking when it is flushed. The original bung
was an expanded foam type, quite heavily deformed. I replaced the syphon on
Friday night as I couldn't flush the wc, the original bung leaked quite a
lot so this morning I got a new one but this is a solid rubber one. It
doesn't leak as badly as the old one.
I guess that I can try and get something closer to the original but I can't
really see why this one is leaking so I assume it is just my technique in
It may be that the top surface of the entry to the pan and the
underside of the cistern are not a good fit and the water is simply
pushing past the rubber collar. A foamy doughnut will probably fix
I would avoid using sealant because you will have difficulty separating
the components in the future.
Is it leaking from between the cistern and pan when flushed, into the
pan all the time, or between the cistern and pan all the time?
The rubber bung - do you mean the rubber ring at the cistern/pan joint?
If so, was it exactly the same size as the old one?
Has it been slightly crushed on one side when fitting?
More info required, but undoubtedly it will be a simple fix, unless you
have cracked the new siphon when replacing it.
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