Rainwater systems come in all shapes and sizes, from simple catchment system under a
downspout to large above and/or underground cisterns with complex filtration systems that can
store thousands of gallons of water.
Most rainwater collection systems are comprised of the same basic components
rooftop or other raised solid surface. The best catchment systems have
hard, smooth surfaces such as metal roofs or concrete areas. The amount of water harvested
depends on the quantity of rainfall, the size of the surface and the slope of the catchment area.
also known as distribution systems. They channel water from the
catchment .area to a holding container such as a barrel, cistern or planted area
Leaf screens - a screen that removes or catches debris.
a screen that removes or catches debris.
a device that diverts the "first flush" of rain before it enters the storage tank.
Most rainwater suppliers recommend that the "first flush" of water is diverted to an outside
area of the storage system since the catchment surface may accumulate bird droppings, debris
and other pollution.
In general, the storage tank is the most expensive component of a rainwater
harvesting system. There are numerous types and styles of storage tanks available. Storage can
be aboveground or underground. Storage containers can be made from galvanized steel, wood,
concrete, clay, plastic, fiberglass, polyethylene, masonry and more. Examples of aboveground
storage include cisterns, barrels, tanks, garbage cans, aboveground swimming pools and more.
Storage tank prices vary based on variables such as size, material and complexity. To inhibit the
growth of algae, storage tanks should be opaque and preferably placed away from direct
sunlight. The tanks should also be placed close to the area of use and supply line to reduce the
distance over which the water is delivered. Also consider placing the storage on an elevated
area to take advantage of gravity flow. The tank should always be placed on a stable and level
area to prevent it from leaning and possibly collapsing.
gravity-fed or pumped to the landscape or other end-use areas.