This post is part of the series How to Build a Simple Rainwater Collection System.

A first-flush diverter helps keep your rainwater harvesting system clean byenabling the removal of dust, other debris, and any fecal matterthat collects on your roof and in your guttersbetween rainfalls, so it is flushed out at the verybeginning of the water collection process.

Thecleaner your water is as it goes into yoursystem, thecleaner your water will be when you use it. Studieshave shown a tremendous drop in fecal bacterialevels when the roof is flushed before water entersthe tank. Bacteria also like to live in decaying leavesand other organic matter that collects at the bottomof the tank. A first-flush diverter “washes” the roof,so there is less rubbish on the tank’s bottom.

Do you want to see more articles about how to build a simple rainwater harvesting system? Check the “Notify me of new posts by email” button below.