I just came back from holiday to find that water was pouring constantly through my dual-flush toilet, as though it's on permanent flush. A little tinkering revealed the shut off valve is broken - so no matter where the float is, the cistern continues to fill.
Apparently this apparatus is called the Bottom Inlet Valve and isn't too difficult to replace.
Anyway, the toilet is also supposed to apparently have a shut off valve, as this is standard on all modern toilets. Even if I can't do the work myself, it would be useful to shut this off when not in use to stop the noise and waste water.
The problem with all of this is that all the internal plumbing on the toilet is concealed. There's not even any visible screws to put in the toilet seat. Nor is there any panels to remove that I can see to get at the pipes.
There are just two screws, just above floor level, one of either side of the toilet. I have removed these, but nothing has come lose or started to shift. I Can't see anything that would just "come away" - the whole bowl of the toilet looks like a solid block of porcelain.
How do I get to the pipework on my toilet, to see if there's an turn-off valve or find where the bottom inlet valve screws in to the cistern?
EDIT: Some pictures of the cistern mechanism and the outside of the toilet. I'm not just interested in isolating the water. I need to find the inlet pipe itself, so I can disconnect the faulty valve.