Rainwater collection / Greywater recycling sytstems?

 rainwater is very un complicated ... just go to a builders merchant  and buy a tank of whatever material...plastic or metal and drop it in the ground and connect up either a gravity feed system of pumped.... you can buy all the automatic watering systems at any decent DIY store...your second part is more complicated ... and firstly you would have to work out if you would be allowed to do this at all here... as laws get much tighter on polluting and also the fact that you might be contaminating the supply to your house...  what i have read about grey water recycling systems suggest they are best only used in the garden... have tried searching on italian sites to see if i could give you a place to start but have not manged to come up with an answer....below is the closest i could get to any metion of it... maybe some of the phrases used could be searched on to see if you can do better.... or just maybe the challenge of trying to help you get the right answer will get you a better reply...http://www.howtodothings.com/it/casa-giardino/come-riciclare-lacqua-dal-lavatriceanyway have you tried asking your geometra... he will know if local laws will permit you to do this and secondly if they do maybe where to find the materailsif you manage to go ahead that way would be interesting to hear about it...good luck  

We have found that planners,surveyors etc in Italy are not as aware as their uk conterparts on things like grey water recycling ,compost toilets etc, etc.They often worry that you may be polluting the local water table or as Adriactica says your own domestic water.Unless your Italian is very good I would try to research the subject on the net - try US living off the grid sites as these seem to have the most innovative ideas and suggestions - some even have youtube clips !!!You may then need to work very hard at convincing your local comune!!!I work on an Allotments Garden project in the center of Plymouth and we collect all our own water and have a very simple but highly effective compost toilet which is basically a shed built over a large pit where liquid and solid wastes go into separate chambers.This is a very clean and non- smelly system much more hygenic than the Italian 'inspection pits ' where concrete boxes fill up with water and untreated swewage that then 'stews' in the heat of the sun until enough water forces it down into the sewer or septic tank !Dry toilets and grey water recycling is the only way forward for countries where water is a scarce and precious resource and rather than seeing these systems as a problem for the environment they should be regarded as a benifit adding much needed organic matter and moisture back to the land and helping to fight dessertification.Bravo to you for trying!