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Winterization
Winterizing the irrigation system is required in freezing climates to prevent damage from water expansion when it
freezes. Following are three key points for successfully winterizing the system, however, Toro provides a complete
“Winterization and Pressurization Guide” (P/N 373-0849) that is available from your local Toro Distributor.
• Open low point drains, vent high points and allow the system to drain naturally several days prior to using
compressed air.
• Attach compressor to the highest point possible and use the compressed air to force remaining water out of the
low points and close vents and drains working from high points to low points when clear air is observed.
• Regulate compressed air to 50 psi and cycle each sprinkler ONCE until clear.
Trajectory Adjustment Procedure
The FLX34 and FLX54 sprinkler models are designed with a dual-trajectory main nozzle.
Use the following procedure to select the sprinkler trajection of 15° or 25°.
Step 1 – Using the multi-purpose tool (P/N 995-83), pull the riser from the provided slot in the cap. Pull the riser
assembly until there is enough clearance for handling and hold onto the riser body.
Step 2 – Remove cap screw and cap to unlock the main nozzle.
Step 3 – Use a 5/8" nut driver (P/N 995-99) to turn the main nozzle assembly. Turn the main nozzle assembly
clockwise until the angle indicator points towards the right to set 25° trajection. Continue turning the main
nozzle clockwise until the angle indicator points towards the left to set 15° trajection. See Figure 2 and 3.
Step 4 – Replace the cap. Make sure the main nozzle is secured and retained by the cap.
Step 5 – Secure the cap with the cap screw.
15°
25°
Radius Reduction - FLX34/54 and FLX35/55 Only (Not for FLX35-6/55-6)
For further refinement of the sprinkler’s radius, an optional radius reduction
screw (363-4839) can be added to break up the main nozzle spray.
The sprinkler cap provides an installation hole just above and in front of the
main nozzle. Using a 3/32" Allen wrench (P/N 995-82), thread the radius
reduction screw clockwise into the installation hole. Turn the sprinkler ON
and continue to thread the screw clockwise into the main nozzle stream
until the desired result is achieved. See Figure 4.
Figure 2 Figure 3
Figure 4