"Toby" wrote in message
...
wrote:
The wall of the plastic type "move" bend with a slight touch. Full of
water will they have the guts to stay in place?
Will they last like a pot one would/does?

Dedicated plastic hidden tanks tend to be of a slightly strange
appearance.
The mouldings used provide extra rigidity and ease of mounting at the
expense of a 'clean' external line. The flush lever will often be supplied
separatly, or you could choose a pneumatically operated valve. A normal
slimline cistern may be slightly slimmer (hardly surprising) if space is
really tight.
They will last indefinately, even if you do choose to flex the side wall
in
and out. The weight of water will not distort the shape. I can't see the
need to have a hidden ceramic cistern.

I have one. They have a lid which screws down. This makes the whole tank
pretty rigid.


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