Слово встречается в следующем контексте:

Are your toilets equipped with toilet-flush-stops?

Заранее спасибо

Чисто wild guessing :-)

Consumption in our hotels will always depend on the behaviour of our guests, but Bass Hotels & Resorts and Bass Leisure Retail both work to minimise usage and wastage.

Initiatives include offering hotel guests the choice of re-using towels and bed linen (to save on water and detergent use); introducing programmes to reduce excessive flow rates in showers and taps, and installing flush-stops on toilets.

http://www.ihgplc.com/files/reports/environment/1998/html/wat_int2.htm

И еще -
Modern toilets have more sensible cisterns of around 6 litres, and even this is unnecessarily wasteful for flushing liquids – you can save a lot of water by installing a dual-flush or multi-flush device in your toilet. The dual flush device has two fixed settings – a light setting for urine and a heavier one for solids. The multi-flush device lets you flush any amount you want – just lift the handle back up and the flush stops.
http://www.biophile.co.za/water/how-to-save-water

ps:
ИМХО = in my humble opinion :-)