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5 Easy Steps to Calculate Water Savings

Estimated Water Savings Using Rain Bird 1800-PRS Spray Heads

EXAMPLE

Calculate your estimated water savings:

Step 1:

Enter the pressure (psi) at the nozzle:  
(Either enter the average dynamic pressure for the spray heads on one zone or enter the average dynamic pressure for all the spray heads on the entire system. If the dynamic pressure is not available, enter the system's static pressure. The static pressure will overstate the water savings, but it will still provide an estimate of the potential water savings.)

Step 2:

Enter the GPM @ 30 psi: 
(If you entered the pressure for one zone above, enter the GPM for that zone. If you entered the pressure for the entire system above, enter the GPM for the entire system).

Step 3: Enter Average Watering Time per Day (min.):
Step 4: Enter Average Number of Watering Days per Week:
Step 5: Enter Average Watering Weeks per Year:

The initial system waste is: GPM
The yearly water savings is:* gallons

*Due to varying conditions, your actual water savings may be different. This formula is designed solely as a basis for estimating potential savings.

Example is based on a system with four zones total, and each zone is similar to the zone illustrated below:

 

Return to Savings Calculator | How the formula was derived