How many times have you seen a landscaping sprinkler system running at full power during a rainstorm? It's not because of a wasteful homeowner at all; it's because the sprinkler system is on an automatic system that does not know the weather. To fix this problem (and save water and money), have a rain sensor installed to your sprinkler system. The sensor determines whether enough rainfall has occurred in order to skip an irrigation cycle. If it senses enough moisture, it breaks the electrical connection to your sprinkler system so it won't turn on. It's easy to install and makes your sprinkler system more efficient.