Concealed cistern fault

[neilutf]

I am amateur DIYer. I have a concealed cistern with push buttons to the front face. Buttons are connected by 2 air tubes which connect to either side of the siphon. Small flush works fine but big flush button just makes a click type of noise around the syphon area. seems to be coming from the rear of the syphon but cannot access area to see. Air pipes are connected. I dont want to dismantle the whole thing if there is no need. Any advice appreciated.

Thanks

 

[Alanc]

It could be a Thomas dudley, can u see if flush valve is green.
Inside the top lid of these there is a little plastic piece that lifts the bellows, this often needs clicked back in.

Try blowing down hoses this will test if bellows in button are punctured.
Al

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[neilutf]

Alanc Thanks for the quick reply. The initials TD are on the unit , so you must be right. The siphon is green and the bellows inside white. I cannot see any other little piece of plastic inside the top plastic lid. I am probably not looking in right place. If I blow down one hose - nothing happens. The other hose makes the same click.

 

[Alanc]

So can u access the valve
Did you take off the cover of the valve, look for a hinged piece of a plastic, these often disconnect from holder thingy.
If u determine whether the bellows are punctured then a service kit would be cheaper than replacing whole valve.
Hth
Al

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[neilutf]

I thought it was all one unit. I can see the problem now. The plastic open clip that the bellow lid is hinged on is cracked and not hold in insitu. Can I purchase the syphon/valve seperately or do to but a complete cistern.
neilutf

 

[Alanc]

buy the dual flush valve on its own, it is just rotated to remove from cistern.
Al

 

[neilutf]

Thanks for your help Al
Neil utf