Rainwater First Flush Diverter

Basics

• 10-50 gallons per 1000 sf roof need to be diverted: [1]
• For 1250 sf Seed Eco-Home roof - 12-60 gal needed
• Examining prices below, it's best to use 6" pipe - more storage, lower cost.
• If store 30 gallons - 30/600 = 5% of rainfall in 1" of rain
• 1" of rain is 800 gallons or $8 at a rural water rate of 1 cent per gallon [2]. That is $320 value of water per year just from rooftop catchment.

Sourcing

• Amazon - [3]
• 8" pipe - $53 - [4]

• 18 gallons/7 feet
• 8" cap is $33 - [5]

• 6" pipe - $40 for 2x the length.

• 29 gallons per 20'

• 6" elbow is $30 - [6]
• 6" cap is $12 - [7]