Mr Sprinkler Repair

Sprinkler Repair

Mr Sprinkler Repair

Diagnosing Leaks: How to Find and Fix Hidden Sprinkler System Leaks

Dealing with a leaky sprinkler system can be a frustrating and water-wasting problem. Whether it’s a small drip or a gusher, hidden leaks can cause excessive water bills, harm to your landscape, and potential damage to the foundation of your home. But fear not! With some detective work and a little DIY know-how, you can track down these elusive leaks and fix them, ensuring your sprinkler system runs efficiently once again.

Identifying the Signs of a Sprinkler Leak

Recognizing that there’s a leak is the first step. Here are a few tell-tale signs that your sprinkler system might have a leak:

  • Soggy patches: Areas of your lawn that are softer or greener than others may indicate a leak.
  • Visible damage: Cracks or damage to sprinkler heads.
  • Erratic spraying: Sprinkler heads that don’t spray properly or produce a weak flow could point to a leak.
  • High water bill: An unexplained increase in your water bill often points to leaks somewhere in your irrigation system.

Steps to Finding Sprinkler System Leaks

Step 1: Inspect the Sprinkler Heads

Begin your investigation by checking the most visible part of your sprinkler system – the sprinkler heads. Look for cracks, broken or missing parts, or debris that may be obstructing the flow of water. Clear away any dirt or grass that could be clogging the head.

Step 2: Check the Valves

Sprinkler valves control the distribution of water throughout the system. If a valve is leaking, it can create wet spots near the valve box. Open the valve box and look for any water or signs of moisture that could indicate leaks.

Step 3: Conduct a Pressure Test

In some cases, the leak might not be visible, and a pressure test on the system can help detect underground leaks. Turn off all the water inside your home and monitor the water meter for movement. If it continues to change, there’s a strong possibility that there’s a leak in the system.

Step 4: Use Leak Detection Equipment

For more stubborn or hard-to-find leaks, consider using leak detection equipment. This can range from specialized listening devices to test plugs and pressure gauges that can help locate the exact point of leakage.

Repairing Sprinkler System Leaks

Fixing Sprinkler Heads and Valves

  • Repair or replace damaged sprinkler heads: Unscrew the head from its fitting and replace it with a new one.
  • Fix leaking valves: For minor leaks, tightening the screws on the valve may fix the issue. For more significant problems, replace the entire valve.

Patching Pipe Leaks

  • Locate the compromised pipe section: Look for a noticeable drop in water pressure or use a hand-held soil probe to check for soggy ground away from the sprinkler heads.
  • Expose the pipe: Carefully dig around the pipe to uncover the section with the leak.
  • Cut out and replace damaged pipe sections: Use a pipe cutter to remove the damaged section and replace it with a new piece of pipe. Connect the new pipe using slip couplings and PVC glue for a secure fit.

Preventive Measures for Future Leaks

  • Regular maintenance: Periodic checks and cleaning can go a long way in preventing leaks due to debris and wear.
  • Winterize your system: Before the onset of freezing temperatures, make sure to drain your system to prevent pipes from bursting.
  • Professional inspections: Schedule annual professional inspections to catch potential issues early on.
  • Monitor water usage: Keep a close eye on your water bill for any unexpected increases, which could indicate leaks.


Hidden sprinkler system leaks can be a nuisance, but with a systematic approach, they can be found and fixed, restoring the efficiency of your sprinkler system and saving you water and money in the long run. If you’re unsure about any steps in the process, don’t hesitate to contact a professional. Your lush lawn and garden will thank you for it!


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.