Originally Posted by ed2hess
Did you by chance see any numbers on how much water they project they
can harvest per year? I would guess most homes average around 140,000 gallons of water used each year.
There is a formula that you use concerning the square footage of the roof, historical rain fall and storage size.
Drip spacing depends, I generally use 12" spacing and rainbird tube on resi installs. On commercial I have used up tp 18" spacing NF.