Berkeley

Rainwater run-off from the cement paths at UC Berkeley are diverted to this vegetated area, a "bioswale". The stormwater is slowed, and infiltrates into the ground preventing runoff into the nearby creek.

This 500 gallon rainwater cistern is tucked behind a porch in Berkeley, CA.

Gutters are rerouted into this 500 gallon cistern.  Note the large manhole at top for access inside for cleaning, the outlet with ball valve connected to a hose at the bottom, and the overflow near the top left.

Rainwater is screened before entering the cistern to remove leaves and debris.  The screen also serves to prevent mosquitos from entering.

A garden hose is connected to the outlet at the base of the cistern, which is controlled by the ball valve. This enables the rainwater to be used for outside irrigation.

A "first flush" system catches the dirtiest first rainwater (which has rinsed soil off the roof), in the vertical pipe, preventing it from entering the collection cistern. When the pipe is full, cleaner rainwater proceeds to the cistern.  The "first flush" water in the pipe is released from a spigot at the bottom.

The rainbarrels are connected at the  bottom with T fittings and 1" vinyl tubing. One barrel (only) needs to have a hose connection to access the rainwater. The cap that screws into the threaded bung hole on the top of the barrel is left slightly loose in order  to allow air to escape.