Connecting Hydraulic Control Tubing
Step 1 – Route control tubing from the controller to the sprinkler location(s).
Note: Leave an 18" (45.7 cm) service loop of tubing at each sprinkler to facilitate movement of sprinkler and
service operations. Refer to Hydraulic Control Systems Table for tubing run length and sprinkler elevation
information.
Step 2 – Flush tubing thoroughly to remove all air and debris.
Step 3 – Remove the tube retainer and poly cap from the tubing adapter at the base of the sprinkler.
Step 4 – Slide the tube retainer over the end of the control tubing and attach tubing to adapter.
Step 5 – Slide tube retainer over the adapter area to secure tubing.
Hydraulic Control Systems Table
Maximum Distance
Type of System*
From Controller
Elevation Restrictions
Normally Open (01)
Valve elevation should not exceed
with 3/16" Control Tubing
500'
25' above controller elevation or
70' below controller elevation.
Normally Open (01)
Valve elevation should not exceed
with 1/4" Control Tubing
1000'
25' above controller elevation or
70' below controller elevation
* - All hydraulic connections on Toro valves are 1/4" insert type.
- Control line pressure must be equal to or greater than mainline pressure.
- Control line pressure range is 40 to 150 PSI.
System Start Up
WARNING! Never stand or lean over the sprinkler while the irrigation system is being filled, during manual or
automatic operation or when performing sprinkler service procedures. Direct contact with irrigation spray, a failed
or improperly installed sprinkler connection or sprinkler components forcibly ejected upward under pressure can cause
serious injury.
The following is a recommended procedure that will protect system components during system start-up. The procedure
is based on a velocity fill rate of less than 2' (.61 m) per second. See Table 3 below.
Step 1 – Use a jockey pump only to fill the system at a velocity fill rate of less than 2' (0.61 m) per second.
CAUTION: Failure to comply with recommended fill rate will increase line pressure resulting in a water
hammer effect that could damage sprinklers and piping components. See Warning above.
Step 2 – Use quick coupler keys at all tees and greens with quick coupler valves to bleed air from the system
lines during the filling process. For best results, do not compress air and then relieve it – bleed the air
continuously while filling the system.
Step 3 – After water has filled all lines and all air is removed, remove the quick coupler keys.
Recommended System Fill Rate
Pipe Size
Flow
Velocity
Pipe Size
Flow
Velocity
in. cm
GPM LPM ft/sec m/sec in. cm
GPM LPM ft/sec m/sec
1/2 1.3
2 7.6 1.60 0.49 3 7.6 45 170.3 1.86 0.57
3/4 1.9 3 11.4 1.92 0.59 4 10.1 75 283.9 1.87 0.57
1 2.5 5 18.9 1.50 0.46 6 15.2 150
567.8 1.73 0.53
1-1/4 3.1 10 37.9 1.86 0.57 8 20.2 250 946.3 1.70 0.52
1-1/2 3.8 10 37.9 1.41 0.43 10 25.4 450
1703.0 1.97 0.60
2 5.0 20 75.7 1.80 0.55 12 30.5 500
1893.0 1.55 0.47
2-1/2 6.4
30 113.6 1.84 0.56
