Originally Posted by Ed

Get a meter Daz, it's way cheaper. Was in Sainsbos Thursday and they was giving away free cistern bags - ie to fill with water and put in the cistern. I've done our loos, and they still flush OK, as DT says, saving is about 30%. The package also contains a narrowing device to put in the shower head to reduce the amount of water flow, but I like a torrent in the shower so I haven't fitted it.