How to Pinpoint Water Leaks with the LD-12
Go to Home Page
Go to Product Hub Page
Go to Water Leak Detectors Page
Go to Correlators Page
Go to Loggers Page
Go to Training Hub Page
Go to LD-8 Operating Instructions
Go to LD-12 Operating Instructions
Go to LD-15 Operating Instructions
Go to LD-18 Operating Instructions
Go to DLD Operating Instructions
Go to Finding Leaks Hub
Go to How to Find Leaks Page
Go to Survey for Water Leaks with the LD-8
Pinpoint Water Leaks with the LD-12
Go to Survey & Pinpoint Leaks with the LD-15
Pinpoint Water Leaks with the LD-18
Go to Information Hub Page
Go to What Our Customers Say Page
Go to Our Contact Information Page
The sounds of leaks in pressurized water pipes can travel for hundreds (even thousands) of feet in every direction down the mains and services. If there is no evidence of the leak, then compare the loudness of the leak sounds at the meters, valves, and hydrants:

When you have found the two meters, valves, or hydrants with the loudest leak sounds, you are ready to begin the final "pinpointing". First, mark the exact location of the pipe between the two loudest valves, meters, hydrants, etc. with a pipe locator. Then listen every 2-3 feet directly over the pipe.

Listen directly over the pipe between these two loudest locations. Use your hearing and the meter to determine exactly where the leak sound is loudest:

If the pipe is under soft ground or loose fill and if it is not too deep (only 3-5 feet), then using boring bars or push rods may be effective. Touch the pipe if possible, but if the pipe is deep or the soil is rocky, try to get the bars in firmly at least 2-3 ft deep.

Always check for other underground utilities like gas lines or cables before pushing bars or rods into the ground over the pipe.

Use the magnet base on the sensor. Listen on the bar close to the ground (less wind). Compare the loudness at all the bars with your hearing and with the Meter Display.

With the boring bars (or push rods) touching the pipe at 2 or 3 locations, compare the loudness of the leak:

If one bar is louder, then it is closer to the leak. Move the other bars closer to the loudest bar and listen again. Keep moving the bars until they are only 5-10 ft apart and center bar is loudest. Dig.

The Low and High Filters are used to filter out outside noises of wind, traffic, A/C hum, etc. If you encounter these interferences, try the 200 Hz filter or 400 Hz filter while listening on the same surface but 15 feet away from the water lines:

If the filter removes the outside noise, then listen over the pipe again and re-adjust the Volume.

More LD-12 Information:

LD-12 Product Page

LD-12 Operating Instructions

Comparison of the LD-15 Leak Survey Instrument With the LD-12 Water Leak Detector

List of LD-12 Users

5 Year Warrranty

LD-12 Manual Download

PDF of
Full Manual
back to top of page


© 2016 SubSurface Leak Detection