Global Water WL400 Manual page 6

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Sewer Flow Option
k. The WL400 Sewer Pipe Flow Option includes a level sensor built into
a protective "mouse" housing and attached to a 12" stainless steel
strap. The sensor/straps can be installed at the invert of a sewer or in
a pipe, the cable can be attached to a sewer's stair rungs and run to
the data monitoring device.
l. When installed in a pipe that is under 12" diameter, the steel straps
spring into the pipe, holding the sensor in place. Additional fasteners
are usually not required for this type of installation.
m. For a sewer pipe over 12" diameter, the sensor's steel straps must be
mounted into the pipe. The straps can be secured with molly or
concrete bolts, or with marine-grade epoxy.
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