On Thu, 18 Jun 2009 11:32:59 +0100 someone who may be "george
(dicegeorge)" wrote this:-

Should a plastic water tank be reinforced to stop it flexing when the
ballcock goes up and down?

Yes, normally.

However, if the inlet pipe is adequately supported then the tank
will not flex. Adequately supported includes a fixing of the pipe
within a few cm of the ballcock. This can be done if there is
something solid like a brick wall very near to the tank, which is
unlikely in most cases.



--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54