Spectrum Analyzing Digital Electronic Leak Detection
Leak detection instruments amplify sounds in the 200-2000
MHz range. They do not "find leaks" anymore than a
stethoscope diagnoses illnesses. By using highly specialized
microphones contacting hard surfaces, acoustic signatures
can be analyzed. But mere possession of the best equipment
doesn't make one competent anymore then buying a scalpel
makes on a surgeon.
Few plumbing firms actually have leak detection equipment.
Most just advertise it and subcontract it out. Both tend to
use the old fashioned analog detectors.
We use not outdated analog detectors but the finest
MetroTech spectrum analyzing digital electronic leak
detection instruments. With the
MetroTech digital
instruments we can analyze acoustic signatures and filter
out superfluous sounds and view the signature over a
timeline.
Procedure Overview
The first step we perform is determining if the
diagnostic procedure is even warranted. Many clients request
leak detection services and we determine the procedure and
costs are not needed. If after isolation metering tests and
an inspection reveal that spectrum analyzing leak detection
services are indicated, we commence by conducting a brief
client interview to obtain and formulate a history of their
potable water distribution, repair and leak history.
Excellent clues can be obtained this way.
 Next
a contact microphone is used to touch the exposed
appurtenances of the water distribution system such as
emergency water shutoffs, shower valves or other exposed
tubing. If these are not available, then we use ground-based
microphones. If a strong acoustic signature cannot be
obtained such as the leak is intermittent or too small, then
gas ingestion via a compressed cylinder may be warranted.
Once we have a target acoustic signature, we use our
MetroTech instruments to analyze the frequency spectrum and
usually we then filter out all but the strongest signature.
In preparation to excavate through the concrete slab, it is
often prudent to diamond saw through or score the concrete
so our larger electric jackhammers do not create or
propagate concrete fractures past the perimeter of the
excavation.
Prior to excavation, we often times dust bag off the area.
This protects our client's home and demonstrates our level
of care.
A secondary alternative dust control method is using a large
industrial vacuum with a new dust filter installed, and an
assistant sucks the dust generated by the concrete saws and
jackhammers.
Repairs usually involve use of high-temperature silver
brazing materials and techniques, as most codes prohibit use
of low-temperature common plumbing solders. Additionally, in
buried potable water pipes disinfecting water lines that
have sucked in unsanitary earth requires that a disinfection
protocol be used which is routine for us.
After the repair is effected, a test is performed and the
small excavation is backfilled usually with sand so that no
sharp rocks are touching the soft copper tubing.
If in our professional opinion the cause of the leak was as
a result of negligence of the original installer, we may
advise you on statues of limitations issues in an attempt to
assist you in getting reimbursement from the original
installer, although normally standard homeowners insurance
covers the majority of this repair procedure. |
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| You are terrific. It helps
us so much to have trustworthy help from afar. -
Mark & Kris
Ammons |
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