A well-functioning irrigation system maintains a healthy lawn and garden, but it's common for homeowners to encounter issues with the sprinkler head at the beginning of the season. Whether it wasn't winterized properly or experienced unexpected damage, identifying the problem can prevent water waste, landscape deterioration, and higher utility bills.

Common signs of a malfunctioning sprinkler head include:

  • uneven flow of water spray
  • water pooling
  • dry patches on the lawn caused by insufficient water flow

Cleaning or replacing a faulty sprinkler head can often resolve these issues. Regularly inspect your system to ensure all components are working efficiently. To identify underwatering in your sprinkler system, there’s an easy test to find trouble spots, so we tapped the crew at Benjamin Franklin Plumbing to learn more.

How to Test For a Clogged Line

"You’ll need a series of containers that are of the same size," starts Joseph Wade, VP of Operations of Benjamin Franklin Plumbing. "Empty soup cans will work best, but you can also use milk cartons with the top cut off or even measuring cups of the same size."

He continues, "The idea is to scatter containers of the same size around your lawn and garden watering area so you can verify how much water is landing in each location. If you're performing this on your lawn, spread the remaining cans out as evenly as possible for the best results. Then, with the cans in place, run your sprinkler system for about 20 minutes. After 20 minutes, use a ruler to measure the water depth in each can. Compare the water depth of each can to determine if certain areas are getting significantly less water."

Once you’ve identified the clogged sprinkler heads or spray nozzles from this test, the issue can usually be cleared with a little gentle brushing of the spray head. Just as you might clean the water jets on your showerhead, you can soak the sprinkler nozzle head in white vinegar, or use a toothbrush wet in vinegar to treat mineral deposits. "If the issue persists, call a licensed plumbing professional to inspect your residential sprinkler system and make the necessary adjustments," notes Wade.

Smart irrigation system in the yard of a modern home.
A smart irrigation system makes it possible to reduce water waste and automate watering schedules. Credit: Irrigreen

FAQ

What is the lifespan of a typical lawn sprinkler head?

Most brands of sprinkler heads typically last 5-15 years, depending on the quality, usage, and maintenance. Routine checks for broken heads and timely sprinkler head replacements can extend their lifespan.

Does water flow affect how long a sprinkler head lasts?

Sure does. Water flow can impact the lifespan of a sprinkler head. High water pressure can cause wear and tear, leading to quicker deterioration and the need for a replacement head. Ensuring optimal water pressure and regular maintenance can help prolong the life of your sprinkler heads.

How can I check for issues with my underground sprinkler pipes?

To check for issues with underground pipes, look for signs such as wet spots, unusually green patches in your lawn, or areas with poor water pressure. You can also listen for hissing sounds when the system is on. For a thorough inspection, it may be necessary to hire an irrigation company to use specialized equipment to locate and diagnose sprinkler valve or pipe issues.

What is a slip coupling, and when should I use it?

A slip coupling is a plumbing fitting used to repair or replace a damaged section of pipe without extensive excavation. It doesn't have anything to do with a sprinkler head repair, but it allows for easy connection and adjustment of water pipes. A homeowner should consider using a slip coupling if you need to fix a leak or break in your irrigation system's pipes quickly and with minimal disruption.

An overhead view of a yard with irrigation systems watering the lawn.
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How do I maintain pop-up sprinkler heads?

To maintain pop-up sprinkler heads, regularly clean the nozzles to prevent clogs, check for and replace any damaged parts, and ensure they retract and pop up properly. Adjust the heads as needed to ensure even coverage. Periodically run the system to check for proper operation and make any necessary adjustments or irrigation repairs.

How often should I run my sprinkler system?

The frequency depends on your climate, soil type, and the specific needs of your lawn and garden. Plus, you'll need to consider local regulations during droughts or water restrictions. Generally, a well-watered lawn demands about 1" to 1.5" of water per week, including rainfall. The tree roots would be happy with that, too.

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Is it worth getting a smart irrigation?

We think so, and irrigation experts think so, too! Smart irrigation controllers adjust watering schedules based on weather conditions, soil moisture levels, and plant needs. Many homeowners love that it helps them conserve water and optimize water pressure and spray patterns across the flower beds, garden, and landscape.