um, the goal is to get the heater going by drawing on the hot supply, right? I’ve only ever seen cold supply hooked up to a toilet. So emptying and refilling the toilet tank doesn’t use up the cooled water in the hot supply line. However, catching cooler shower water in a bucket and using this to manually flush the toilet doesn’t waste the water. It is a lot of effort though.
um, the goal is to get the heater going by drawing on the hot supply, right? I’ve only ever seen cold supply hooked up to a toilet. So emptying and refilling the toilet tank doesn’t use up the cooled water in the hot supply line. However, catching cooler shower water in a bucket and using this to manually flush the toilet doesn’t waste the water. It is a lot of effort though.