Suggestions and Resources to Make the Most of California's Latest Greywater Standards Revision
Is any of this included in new codes, or is it still in the suggestion phase?
12. .
I don't have a copy of CA 2010. But from CA 2007:
1602.0 Gray water is untreated household waste water that has not come into contact with toilet waste. Gray water INCLUDES water from bathtubs, showers, wash basins, clothes washers and laundry tubs. It shall NOT include water from kitchen sinks or dishwashers.
1603.0 It shall be unlawful to contstruct, install, or alter ...any gray water system....without first obtaining a permit to do such work.
There is still the provisions that the installer must provide an operation and maintenance manual, and for sure the water must be distributed UNDERGROUND. Note that gray water can NOT be routed in to flush toilets. Chapter 16 has provisions to bring in TERTIARY treated reclaimed water from the city to flush toilets. The isolation and backflow requirements on the rest of the house are stiff.
We have a reclaimed water system in San Diego. There are literally MILLIONS of gallons per day which are simply diverted to the city sewer because the morons have not installed a widespread distribution system to make it available for use. It is used for a lot of steet, freeway, and golf course landscaping.
As for the water supply, cetainly the hot and cold are accessible at the water heater. If it is some distance to the washer, the quick and easy way is to run some 3/4" PEX over to the washing machine. I would install a separate cut off AT the water heater, as well as shut offs at the WM. You can solder or even sharkbite your tees into your lines at the water heater. A quick browse at the hardware store will reveal all the assorted fittings and valves to make this work.