My 55 gallon plastic barrels are recycled from Anderson's Car Wash. They cost $8 a piece and originally held bio-degradable detergent. The rain collection unit is placed under my deck with a spigot coming out of the lattice, so it is not visible from the yard.

Rain comes off the roof from a 3" ABS plastic pipe (1) and drops into the diverter 'T' (2). Air purges from vents (5) at the top of the barrels and allows the tanks to take on water until diverter is full. Water then passes beyond the diverter and out an overflow. The plenum (3) is pressurized by the tank volume and comes out a spigot (4) A pipe extending the plentum (6) allows debris to fall past the spigot outlet during filling. A plug is for seasonal clean out and tank expansion.
The diverter serves a couple functions...





