Take your rainwater harvesting to the next level with a completely automated watering system. Although designed to work with Bushman tanks, these components can be adapted for use with any rainwater tank. Leaf catcher (E) captures leaves and other large debris. First Flush Diverter (F) captures the first few gallons of rainfall keeping pollen, dust, and small material out of the tank. (I) (K) (L) are an automated pump setup for your irrigation system.
Daisy Chaining, or connecting barrels/tanks together is an easy way to add capacity to your system. You can start small and add on later, or even capture water in one location and store it elsewhere. A few basic principles of water flow are all you need know: (1) Water flows downhill; (2) Water seeks its own level.
Tank A has to fill all the way until water runs thru the pipe into B. If you add more tanks C & D, they only get water when the tanks in line before them fill first. The faucet at the bottom of Bwill only empty B, A only A, so you need to have a separate faucet for each tank. This setup works well if, for example, B is located downhill from the house. A fills up by the house, and when full it fills B down below. Separate faucets draw out of each tank.
A and B act as one tank so the water levels in both tanks rise and fall together, and a faucet on either tank will draw water from both. They don’t need to be side by side; A can be under the gutter and B way around the side of the house.
If A or B is a larger (ie, taller) tank, you’ll need to make some minor adjustments. Raise the lower tank so its top is level with the other – that way both can fill to the brim. Put your faucet on the tank with the lowest bottom so you can draw water completely out of both tanks.