Rooftop Catchment

Credits: Dan the Irreverend

Download: File:Roofcatch.pdf

• Get cheapest washed gravel - small works better
• Porosity of pea gravel is .65
• Gallon/day/person - 15 gal/day bath-cooking-water-animals
• 3-1 long to wide
• 2x depth away from house
• dig a ditch next to gravel tank - put side and top liner there - roll a piece of PVC, screw down to keep anything from getting in there.
• Culvert with pie cuts
• Culvert looks like a riser. Riser comes out of ground 6" - so no flood water.

• Go down to 1 micron - 500 gallon tank
• Reef Industries - 19 mil - should be about 30 cents per square foot.
• ressure-compensated septic drip tubing at Home Depot