First Flush Diverters

RainHarvesting by Blue Mountain Company
https://rainharvesting.com.au/products/first-flush-diverters/

Tank Town
www.rainwatercollection.com

For how to make a simple home-made first flush diverter see pages 8-9 of Texas Manual on Rainwater Harvesting, 3rd edition, at www.twdb.texas.gov/publications/brochures/conservation/doc/RainwaterHarvestingManual_3rdedition.pdf

Tucson
The Rain Store
https://www.therainstore.com/