then once i'd tried it on for size, once i'd tested it over time in different situations and circumstances and experienced its awesome power, i noticed i have a tendency (it's a real danger in fact) to make a rule out of it, to apply it always in all situations and in all circumstances. i find it very interesting that you do not believe in the various other options available to you. the hot water is provided by a domestic electric water heater & the cold water is also the drinking water tap for the site. 