Problem with the loo - plumbing help needed

[Oneeyedvic]

I have a separate low level toilet suite and there is a leak in the 'rubber flange' where the flush pipe goes from the cistern to the bowl.

It happened about a year ago and I replaced the flange - but it has started leaking again.

Since this has never happened in any previous house, I am assuming that it is not the flange that is wrong but something else?

Any advice appreciated.

[stuelwell]

it may be that the flush pipe that goes into the flush cone at the back of the pan is too short and not making a water tight connection.

[terence7556]

is it a continuous leak or only when you flush.
does the toilet have its own isolating valve

[Oneeyedvic]

It is only when I flush - and yes it does have an isolation valve on the inlet.

I am fairly sure that the flush pipe is long enough.

I have been told by a friend to put 'plumbers mate' on the flange - will try that tomorrow morning unless any other ideas come up.

[tezestwing]

it is very unusual for the doughnut to pass water could there be any restrictions in the rim of the bowl to course back pressure it is also doubtful that the flush pipe is leaking as it would leak all the time smear of plumbers mate does help between ceramics?? and plastic threads if when you do find the reasons I would invest in a split syphon or better still a push button as such http://www.screwfix.com/prods/42562/Plumbing/T oilet-Fittings/Torbeck-Oneflush-Drop-Valve no need to repair the diaphragm it doesnt have one if you have a ceramic you mayy need to leave out the spacer that comes with the button HTH Tez

[tezestwing]

seem to run out of space just like to add rubber doughnuts could split and need replacing when moved, best to get with plate and rust less bolts in kit form HTH Tez

[stuelwell]

its a low level tezestwing not a close coupled.
i am a plumber and would recomend if the flush pipe is long enough, try changing the flush cone first as i will be cheaper than buying a tub of plumbers mate

[Clanad]

I'm assuming (always dangerous, I know) that your systems are relatively similar to ours here in the U.S. If thats the case, be sure to check the waterseal washers that hold the tank (cistern?) onto the bowl. These are usually brass bolts and have a washer under the head inside of the tank. These can leak, as I've found. Additionally, be sure the holes around the bolts aren't cracked. We had one that had a small, cantankerous leak and traced it to a small crack that ran outside of the radius of the bolt/washer head...

[theshedman]

Hi, we had this problem with toilet and had it repaired a number of times as it was leaking from joints. After fixing, it was ok for about 12 months then started leaking again. After many wet patches we found out it was a loose floorboard that was causing the problem, as the toilet was rocking slightly and making the joint crack. Worth looking at just in case.

Shed