We're doing a major remodel on our house (start date is uncertain, but we are hiring a contractor this week). Depending on how the conversation goes with the contractor/permitting department, we may be putting in an entire-house greywater system to run to the back yard garden. However, if the permitting department is uncooperative (as I strongly suspect they will be), we'll be using the Greywater Guerrillas resources to DIY after the inspectors leave. Someday. Not sure when we'll get around to it.
If the full-house system doesn't work at the moment, we're considering getting the tub/sink greywater system (AQUS=sends used sink water through a filter to fill the toilet). The system is less than $300, which wouldn't be a big deal to us in this remodel, cost-wise, but I certainly don't want to waste money.
One benefit of the AQUS is that during the rainy season here (Oct. to April), we don't need to water the yard, so that wouldn't really be saving any water, whereas we use the toilet year-round So I think on net, the AQUS will save us toilet water for about 1/2 the year.
So my question is, would you just wait and tie the bathroom sink into the full-house system or go ahead and get the AQUS system? We're never going to recoup the costs (we're already classified as "minimal water users" due to our current time-consuming guerilla tactics, so our variable costs in water are tiny), but it might save us some effort and a fair amount of water in that all toilet water would be re-used.
Re: Greywater dilemma