I recently built a brew stand and what I do to conserve on water is recirculate chill water through a plate chiller while recirculating wort through it. Once the water gets hot, I dump into a bucket and eventually put it into a rain barrel and then on my garden. Saves me at least 20 gallons a week so I feel good about it, but not sure the trade off with electricity to run my pump justifies this or not. I do filter my cold water so it cuts down on how often I have to change the filter, so it might be worth it in the end. I just hate dumping water down the drain without using it for drinking or cleaning purposes...