Mirage M-‐125 / M-‐115 Operating & Maintenance Instructions
12
4
The sprinkler is
not
reaching the
expected radius
The delivery
pressure to the
sprinkler is too low.
The sprinkler main
nozzle is the
incorrect size or is
clogged.
Depressurize the
mainline or sub-‐
lateral piping
before attempting
the last two
possible root
causes
The bottom inlet
filter is clogged with
debris.
Verify delivery pressure with a
Pitot tube and pressure gauge
while the sprinkler is operating.
Is the operating pressure
matching the design pressure
indicated on the drawings?
Verify the nozzle size that is
molded into the side of the nozzle
body. Remove and verify no
debris is blocking the nozzle port.
Disassemble the sprinkler and
remove the foot valve. Inspect the
inlet screen and remove any
accumulated debris, then re-‐
assemble.
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