We need good understanding of the plumbing details of your house.
- Des the house have stumps
- Is there enough space to reach pipes
- what will you hod the water in
- is the land sloped
- will you use a pump
- where will the water be used
- distance between source and use
In case I run low, we have about 16 inches of rainfall a year.
I supply 2 households with water, and I find it very difficult to encourage people to use water wisely.
Depletion is the 'just in case'.