Vitra dual flush running constantly....Help?

[Mick590]

Hi,

Can anyone advise me on how to stop my dual-flush Vitra toilet running constantly?
Firstly, how do I open the cistern lid?
The toilet was fitted in our new house in late 2007.
Any help greatly appreciated. I have isolated the in-line valve & flushed the cistern.

 

[JCplumb]

Hi,

The water level never seems to reach the overflow tube on the right?

View attachment 9931

I thought you meant there was a seperate overflow out of picture on the right. If you mean it is passing without reaching either a seperate overflow - or the integral overflow in the flush valve then 'oops'...

 

[Mick590]

No mate, the tube in the original picture I presume is the overflow into the bowl?

 

[JCplumb]

No mate, the tube in the original picture I presume is the overflow into the bowl?

Yep that's it. and it must be kaput as mentioned previously. Looks relatively clean in your cistern but who knows, it may need just cleaning or replacing as mentioned above.

 

[Mick590]

:banghead: OK, what can it be?


I've replaced this complete unit & it's still running into the pan!!!
The area on the base of the cistern seems damage free & clean.

Help!!!!

 

[Mick590]

Have taken the flush mech out now, is a bead of silicone a good idea or not?

 

[MrMeek]

Have taken the flush mech out now, is a bead of silicone a good idea or not?

question, does water still run into the pan when the lid is of?

edit- use plumbers gold its better but yes silicone will do the job but you will have to leave it for a few hours to set

 

[MrMeek]

3 things what I can think of whats the problem:

ball valve is letting to much water in and its going through the over flow but you said this was not the case
flush valve is broke but you said you replaced it
next thing I would do is take the lid of and see if its still running if not post back please

 

[Mick590]

Hi,
Ball valve does not keep filling, water stops well below o'flow
Flush valve old & new seem in perfect order. Cleaned old seal before I bought & installed new valve assembly.

When water is isolated, flush toilet and leave........the cistern totally empties which leads me to believe it's getting past the flush valve to cistern seal?

 

[MrMeek]

theres no cracks in the cistern is there?

 

[Mick590]

Can't see any mate, gonna let it dry out completely then see.
Will silicone do the trick or not?

Was looking at putting a layer all around the area then fitting the valve stack.

Mick

 

[MrMeek]

Can't see any mate, gonna let it dry out completely then see.
Will silicone do the trick or not?

Was looking at putting a layer all around the area then fitting the valve stack.

Mick

I would use plumbers gold, put a thick bead around the "black ring" you can use silicone but it doesnt seal instantly.

 

[Simon F]

:banghead: OK, what can it be?
View attachment 9962

I've replaced this complete unit & it's still running into the pan!!!
The area on the base of the cistern seems damage free & clean. Help!!!!

did you replace with complete new unit or take out and replace?

I think you will find it will be the seating washer on the flush section being gunked up
regards turnpin

my thinking was the flush valve, if not dirt, some develop air bubbles and constantly dribble

 

[Mick590]

OK mate,

Will look tomorrow & get some.

Will post the results tomorrow...........

Cheers for the help,

Mick

 

[Mick590]

Hi,

I took the old unit out & cleaned all the seals first then re-installed it.........no fix!!
Bought new unit, set up identical to old unit & still the trickle!!!

Must be a problem around the outlet hole, will try plumbers gold as suggested, then maybe a hammer ;-)

 

[JCplumb]

Without being there it's really difficult to diagnose.
Given what you have said about the cistern totally emptying after flushing it must either be the top seal on the flush connection or the bottom seal in the flush mechanism. You could easily diagnose which if you take the cistern off but leave the flush mechanism in place then put it over your bath and pour some water in it. Look from below to see where the water is passing. If it's dribbling down the threaded part then it's the seal between the valve and the cistern base, if it's dribbling down the inside of the pipe then it's the mechanism.
If it turns out to be the mechanism then take it back to the shop for a refund and get down to a screwfix for a fluidmaster button operated syphon - that is of course if a fluidmaster will fit in there, best to measure first...