> two sets of pipes to every house Could you not recycle clean water? e.g. a rough filter & chlorination of shower/dishwasher water to use for other things. S

> two sets of pipes to every house Could you not recycle clean water? e.g. a rough filter & chlorination of shower/dishwasher water to use for other things. Some stages of a dishwasher without harsh chemicals might be used to water a lawn?