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Originally Posted by Keiron Carroll
I have one of the new type push button toilets I installed just last
year in the bathroom and have noticed in the last month or so that there
is a continuous trickle of water flowing from the rim into the bowl and
every now and then including throughout the night a subsequent top-up
sound heard. There seems very little in there to go wrong, is there a
diaphragm I wonder at the very seat of the central fixings which could
possibly be leaking?? I haven't a clue how this new type flush system
works and would appreciate any help from those more enlightened. It's a
two button arrangement and has a 'float' connected to these buttons
indirectly. I have to say it all looks very very flimsy. I'd also
appreciate any web site url's which show this kind of arrangement so I
can learn a bit more myself. Many thanks in advance.
Keiron Carroll
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I am an amateur but have had experience of this recently. My understanding is that instead of a traditional overflow pipe which used to exit the cistern towards the top and go to either a soil pipe (or directly outside), the new flush valves have an internal overflow where water can trickle through the big hole in the middle top of the flush and into the pan.
The float valve - which does the same job as a ball valve can sometimes get stuck - especially if you have a slimline cistern. You need to move it up and down by hanbd and check that the wall of the cistern is not stopping its free movement. If it is free, you need to adjust this float valve so that it cuts the flow when the water level is around the 6L mark (It think this is a UK standard). Mine was fixed after much trial and error - but is fixed now because I have since fitted two more - and apart from all the instructions being in italian and looking like the illustrations had been drawn by a 4 year old they both failed.
I replaced them both with a Fluidmaster float valve - c. £10 from B&Q and have had 18 months free from any trouble. I was also advised that these are both low pressure and high pressure compatible, but mains pressure was preferable. I have no mains water freed to either, but they work a treat nevertheless.