How to Check for Leaks

Even small leaks can waste hundreds of gallons of water each month. Detecting and repairing leaks promptly can save you money on your water bill, prevent possible water damage, and will help reduce water waste. 

The San Bernardino Municipal Water Department cannot confirm or identify the source of leaks on private property which are not already visible. Reading your water meter is one of the simplest ways to check your water use and detect hidden leaks in your home. Just like the odometer on your car records miles driven, your water meter records how much water you’ve used.

Your water meter measures usage in cubic feet and water usage is billed in hundred cubic feet (HCF). One HCF equals 748 gallons of water. 

Locate Your Water Meter

• Most water meters are located near the curb in front of your home, set inside a rectangular box flush with the ground. To read your meter, carefully uncover the lid. 
• Be cautious when removing the lid. Some water meters have a remote reading device attached by a wire. Remove the meter lid carefully to avoid disconnecting it.
• Always check for insects or animals around the meter box before reaching inside.
• Be sure to carefully replace the meter lid securely back on the box once finished. 

How to Check for Leaks

• Step 1: Turn Off All Water. Shut off all indoor and outdoor fixtures and appliances that use water. 
• Step 2: Watch the Flow Indicator. Look at your meter dial for the flow indicator. This indicator is typically a small blue triangle or star shape. If it moves while all water is off, you may have a leak. (Note: If you have a digital meter, follow Step 1 and then look at the numbers to the right of the decimal to see if they are moving.)

Detect Slow Leaks

Some leaks are too small to immediately move the flow indicator. You can detect smaller leaks by monitoring your meter read over time. 

• Step 1: Record the number on the meter register.
• Step 2: Turn off all water use for 2-4 hours (overnight is best).
• Step 3: Check the meter again. 

If the numbers change, water may be leaking somewhere in your plumbing system. 

Pinpoint the Leak:

• Check your house valve. This is often located at a hose bib on an outside wall in a straight line from the water meter. 
• Turn off the house valve: 
  • If the meter still shows water usage, the leak is between the meter and the house.
  • If the meter no longer shows water usage, the leak is inside the house. 

Irrigation System Leaks 

Irrigation systems have separate shut-off valves, so leaks may not always register on your meter when not in use. To check for irrigation leaks outside the home:

• Walk irrigation lines and look for unusual wet spots. 
• Inspect sprinkler heads for breaks or leaks. 
• Check hose bibs and replace washers if they drip. 

Toilet Leaks

Toilets are one of the most common household leaks. To check for a toilet leak in your home:

• Step 1: Place a dye tablet or a few drops of food coloring in the tank of the toilet. Do not flush. 
• Step 2: Wait 15 minutes. 
• Step 3: If color appears in the bowl, your toilet is leaking and may need a repair. 

Understanding your Water and Sewer Connections:

Homeowners are required to maintain water service lines up to the body of the water meter including the portion of pipe located in the meter box on the customer side. View the Understanding Your Water & Sewer Connections infographic for a helpful reference when identifying service lines of responsibility.

Sewer and water service line insurance options are available to homeowners at a low-cost. Learn more about Service Line Insurance Options.