Dave,
you do need to be aware that older pans require a 9/4.5 litre flush and all the newer cisterns come with a 6/3 litre flush (some newer ones even less). Most of them are able to be adusted to the larger flush by taking out some spacers. Don't try to save water by using a 6/3 cistern on an older 9/4.5 pan as it won't flush out properly and you'll end up using more water trying to clear the floaters.
Mick
__________________ "If you need a machine today and don't buy it, tomorrow you will have paid for it and not have it." - Henry Ford 1938 | 
Single flush-Dual flush 
