I haven't seen anything about this type of setup specifically... but...
When I grew up I lived on a farm... it was once a very old farm and there was a wind mill that actually did the water pumping. We had a big cistern that held the water that was pumped so you had it on windless days... kind of like a battery bank I suppose. Something like that may be a good place to start. I would put a second water holding tank in the attic (provided it wouldn't freeze) to allow gravity feeding of water to the toilets. Use a small pump to get water from the cistern to the attic, let gravity do the rest.
Where I live now, one section of our roof drains at one point (we don't have gutters) and we can fill one garbage can with water if there is a good rain. I use it to water the plants when it's dry.
|