EXTENSION CONNECTION: Set your sprinkler to deactivate during rain

Published: Tuesday, August 13, 2013 at 03:59 PM.

Thus, all automatic landscape irrigation systems require rain sensors or other shut-off devices such as soil-moisture sensor irrigation controllers.

Moisture sensing technology conserves water, saves money, reduces wear on irrigation system components, reduces disease and helps protect water resources from runoff.

If water costs and amount of water applied per watering cycle are known, it is easy to calculate how much money is saved when the sensor interrupts the cycle.

For example, if a system irrigates a half-acre of turf and is set to deliver a half-inch of water to each zone, approximately 13,576 gallons of water will be used during each watering event.

If the water costs $2 per thousand gallons, every time the sprinkler system comes on, the water bill will be $27.15.

Use a disc

The least expensive and most common rain sensor device is the expansion disc rain shut-off.

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