Wiser Water Use
Brad and Linda are both avid gardeners and they wanted to make sure they had plenty of water available—without using the municipal water supplied by the city. They installed two systems to help irrigate their gardens—a greywater system and a rainwater catchment system.
Greywater is collected from the showers, laundry, and bathroom sinks to the filtration unit and then to a subsurface drip irrigation system (see Access), which waters plantings in the front and side yards.
Brad and Linda’s rainwater catchment system is a unique underground solution consisting of a custom rubber liner filled with core-tube bundles. These large perforated plastic pipes give the storage unit its shape and allows uses above the system. In Brad and Linda’s case, their vegetable garden sits on top of the storage, which can hold 11,220 gallons of water. When water is needed for the garden, a small pump pressurizes the stored water for delivery. The chambers, made of recycled food-grade, high-density polyethylene, flex, bend, and roll with the movement of the earth.
In many municipalities, sewer bills are linked to the amount of water used—whether the water goes into the sewer or into your garden makes no difference. Offsetting the water and the sewer fees can make rainwater catchment systems pay off, depending on how heavy your landscape’s water use is.