Help needed with recycling greywater to flush the toilet!
We have a small shower and toilet room and what I'd like to do is use the water from the shower and store it in a tank so that it can be used for flushing the toilet. It sounds simple enough, but I'm new to building things like this so I have a few questions to ask the forum!
1. I've read that greywater can go stagnant quite quickly. Would this matter if it was only being used to flush the toilet? If it is a problem, is there a simple/compact/cheap way of filtering the water first?
2. You'd need to make sure that there was always enough water in the tank to flush the toilet, so there would need to a minimum amount in there that if there wasn't enough greywater from the shower available, that it would get topped up from the mains water. Would you use a float valve for this or is there a better way?
3. I'm not exactly sure where I would be able to position the tank. Either way I would probably have to use a pump of some sort, either to get the greywater into the tank or to get the water from the tank to the toilet. Should I just use a submersible pump or something else?
Any other ideas or small projects that people have done would be great to hear about.