Having holidayed in Spain many times I am puzzled - why here in the UK do we have WCs that have a box attached with a fangled mechanism to flush the toilet when in Spain they appear to just have a spring loaded operating valve on the end of a pipe? - and you can flush theirs many times in quick succession without having to wait for a box to fill with water - isn't their system more frugal in the amount of water used to flush the toilet too? Hope this isn't a silly question, only its been puzzling me for a while! Are we not allowed to install a Spanish style system here?