Owner's Manual

9
Install the FCT tee fitting first, then install the
WFS Sensor into the fitting.
Observe the following general rules when choosing
the sensor location and preparing to install:
• Flush system with plug in place before
installing the WFS sensor, to prevent damage
to the impeller.
• Always install WFS together with a Master
Valve, to provide overflow protection.
• Install the WFS and Master Valve as
near the point of connection to the water
supply as possible.
• WFS requires a section of straight
pipe on either side of the tee fitting to provide
accurate measurement of flow. Tees, ells,
and other fittings cause turbulence which
affects accuracy.
• There must be a length of straight pipe at least
10 times the diameter of the pipe upstream
from the WFS (toward the water supply).
• There must be a length of straight pipe at least
5 times the diameter of the pipe in the down-
stream direction (toward the sprinklers).
INSTALLATION