En este tema, estos sitios son bien fuerte, lo siento, no tenemos este informacion en Espanol.
On this topic, I recommend these sites. They are really strong, I couldn’t improve on this information. I’m sorry I don’t have this information in Spanish.
Brad Lancaster’s site harvestingrainwater.com/greywater-harvesting/
Art Ludwig’s site: http://www.oasisdesign.net/