Z
zimmer46
I have a concealed cistern in our main bathroom which I have identified as a Thomas Dudley Niagara unit. Its a dual flush pneumatic. For some time the long flush has not been working and it can take several short flushes to clear the WC. I have checked what I can. I removed the tubes from the back of the push and both buttons seem to be producing a blast of air. I also tried swapping the tubes round, but still only getting a short flush. I understand the valve unit is a bayonet and can be easily removed. If I do this, is there anything serviceable on the syphon valve that I should be looking for to rectify this ? Or is it just a case of swapping the valve ? Thanks for the help.
