residential greywater system

need to design a water circulation system for a residential house will be housing 6 individuals along the week (2 children 4 adults) and occasionally might host 15 people over a weekend day. The design should include the needed space and capacity recommended for the house, manual redirection option for the greywater sources (sinks, bathtubs, dishwasher, kitchen sink & washing machine) as well as the reedbed filtration system in the outdoors area near the garden. I can provide the .dwg format of the drawings. thank you