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Plastic and non metallic
pipe locator |
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COMBIPHON |
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Plastic and non metallic pipe locator Locating non metallic
(PVC, ferro cement) and metallic pipes using acoustics. As plastic and fibre
cement pipes are not electrically conductive they cannot be located with
instruments such as the Sewerin ELH 6 or the AF
100 which detect electromagnetic fields.
To locate and trace plastic and non metallic pipes we have the System Combiphon®
which utilises acoustics as the detection principle. |
COMBIPHON
FEATURES |
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Distribution Pipes |
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The “Stopper”
is an electrically driven, intensity controlled piston. It is attached to
a hydrant standpipe. The hydrant is turned on and water is allowed to flow.
When the battery driven control unit, “G5”,
is turned on it activates the piston which alternativly restricts and widens
the water outlet. |
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Hearing the pipe's location |
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The water column in the pipe is consequently
set in motion with a resulting “heartbeat” sound which can be
detected on the surface with a ground microphone such as the AQUAPHON®
A 100 the highest sound is heard is where the pipe is located.
The intensity of the “heartbeat” is set via an adjuster on the
stopper. In situations where there are competing sounds and you wish to
turn the unit off to ensure that you are listening to the “heartbeat”,
there is a remote control which allows for single man operation.
An advantage in using an electrically controlled piston, as opposed to a
spring one, is that changes in water pressure, caused by a supply pipe being
turned off & on, have no effect on the settings.
Due to the unique design of the piston the back pressure is minimum so damage
to the pipe & house service fittings is highly unlikely |
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Locating and Tracing Service pipes - Water or gas |
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On smaller pipes such as house service lines
for water or gas the "Knocker" is used instead
of the Stopper. It attaches around the pipe with an adjustable chain.
When it is powered it “taps” on the surface of the pipe and
the resulting noise is heard on the surface by the ground microphone. Frequency
& intensity can be adjusted via remote control. For example near walls
less intensity is preferable but over longer distances higher levels will
travel further |
