If your sprinkler valve is making a hissing sound, it’s usually a sign that something within the system is amiss. Here are some common reasons why this might be happening:

1. Leak in the Valve

The most common cause of a hissing sound is a leak. If the sprinkler valve is not fully closing, water can escape, producing a hissing noise. This could be due to debris in the valve, a worn-out diaphragm or solenoid, or a crack in the valve body itself.

2. Pressure Issues

If the water pressure in your system is too high or too low, it can cause the valve to not function correctly. High pressure might force the valve partially open, letting water through and creating a hissing sound. In contrast, low pressure might prevent the valve from fully closing, achieving a similar effect.

3. Air in the System

Air trapped in the sprinkler system can also cause a hissing noise. When air gets caught in the pipes, it can escape through the smallest openings, including around the valve, producing a sound as it passes by.

4. Faulty Solenoid

The solenoid is an electromagnet that controls the opening and closing of the valve. If the solenoid is malfunctioning, it might not fully close the valve, allowing water to leak out and create a hissing sound.

What to Do:

• Inspect the Valve: Check for visible signs of damage or debris. Clean the valve if it’s dirty and replace any damaged parts.

• Check Water Pressure: Use a pressure gauge to check the pressure in your system. Adjust it according to the manufacturer’s recommended settings.

• Bleed the System: This can help to remove any trapped air. Many sprinkler systems have a manual bleed screw on the valve that you can open to release air.

• Test the Solenoid: Use a multimeter to test the solenoid’s resistance. If it’s not within the manufacturer’s recommended range, it may need to be replaced.

If you’re not comfortable performing these checks yourself, or if the problem persists after trying these solutions, it may be best to consult a professional. Regular maintenance and timely repairs can ensure your sprinkler system operates efficiently and effectively, keeping your lawn lush and healthy.

If you have any questions or need any type of sprinkler system repair, the experts at Mr Sprinkler Repair will be glad to help. Give us a call or 855-695-1000 to set an appointment.