Column 1 shows varied water sizes from 3/4" to 2".

Column 2 shows the projected flow rates that this size of pipe can handle at or less than 5 fps.

Column 3 shows the number of stations (zone) which would be run.

Column 4 shows the number of minutes for each of the stations.

Column 5 lists the water flow in GPM per day.

Column 6 shows the monthly water usage.

Column 7 the cost at $5 per m/gal (1,000 gallons or 4.7 lt).

Column 8, the total water for the 5 month season (we are typically 6 mths from April thru September).

Column 9 shows the cost of water with sewer charge included (but no other related expenses like, wear and tear, maintenance reduction for less use, reduced grounds maintenance expense from costly plant replacement or heath care, and others).

Column 10 and 11 demonstrates the 30% to 40% reduction by having irrigation controllers rescheduled automatically. Typically, today's timer controllers are schedule in the spring for summer and shut off in the fall - known as straight line scheduling, not very water conserving. These new smart controllers receive weather data and reschedule themselves automatically, but do not account for rainfall in most cases so they must be outfitted with a rain sensor and maybe even a soil moisture sensor system.