Manually depress the spindle at
the top of the Wireless Rain-Clik
Fig. 5 
B.  Is the rainfall actually hitting the 
Wireless Rain-Clik™? Check for obstructions to 
rainfall such as overhangs, trees or walls.
Adjustments and Operation
Operation Check to Verify Correct Wiring
Turn on one zone of the 
irrigation system that is 
visible while you are in 
reach of the Rain-Clik™. 
Manually depress the 
spindle at the top of the 
Rain-Clik until you hear 
the switch "click" off 
(See Fig. 5). The sprin
-
kler zone should stop instantaneously. If it does not, 
check to see if is wired correctly. It is not necessary to 
“wet” test the Rain-Clik, although it is an optional way 
to test the operartion.
The Rain-Clik can keep the irrigation system from 
starting or continuing after rainfall. The time that it 
takes the Rain-Clik to reset for normal sprinkler opera-
tion after the rain has stopped is determined by weather 
conditions (wind, sunlight, humidity, etc.) These condi-
tions will determine how fast the hygroscopic discs dry 
out, and since the turf is also experiencing the same 
conditions, their respective drying rates will roughly 
parallel each other.
There is an adjustment capabil-
ity on the Rain-Clik that will slow 
down the reset rate. By opening the 
“vent” (see Fig. 6) to completely or 
partially cover the ventilation slots, 
the hygroscopic discs will dry more 
slowly. This adjustment can com-
pensate for an “overly sunny” instal-
lation location, or peculiar soil conditions. Experience 
will best determine the ideal vent setting.
Bypassing The Sensor
The Hunter ICC, Pro-C and SRC controllers are 
equipped with a built-in bypass that allows you to 
override an active sensor. For controllers not equipped 
with this feature, should you desire to bypass the 
operation of the Rain-Clik for any reason (i.e., turn on 
your system even though the Rain-Clik has shut “off” 
due to rainfall), there is a simple way to do this, add 
our Bypass Switch Box (Model #BPSW). This mounts 
on or next to the controller, and by simply moving the 
switch, the Rain-Clik is bypassed.
Maintenance
There is no required maintenance for the unit. The 
Rain-Clik does not have to be removed or covered for 
“winterizing” purposes.
MINI-CLIK
®
 RAIN SENSOR
Simple, Accurate, Rugged and Reliable Rain Sensor
In most installations, the Mini-Clik acts as a switch to 
break the circuit to the solenoid valves of the irrigation 
system when it has rained. This allows the timer to ad-
vance as scheduled, but keeps the valves from activat-
ing and allowing water to flow.
The Mini-Clik Rain Sensor automatically compen-
sates for the amount of rainfall that occurred before 
reactivating. Hygoscopic discs absorb water and then 
expand proportionally to the amount of rain that fell. 
As the moisture-laden discs expand, they activate a 
switch that interrupts the electrical circuit from the 
controller to the valves. Once the Mini-Clik has dried 
sufficiently, the switch closes again to allow for normal 
operation. The time it takes the Mini-Clik to reset for 
normal sprinkler operation after the rain has stopped 
is determined by weather conditions such as sunlight, 
wind, humidity, etc. These conditions will determine 
how fast the discs dry out. The irrigated turf also ex-
periences the same conditions. So when the turf needs 
more water, the Mini-Clik is already reset to allow the 
sprinkler system to go at the next scheduled cycle.
Wireless Rain-Clik
™
 / Mini-Clik
®
 Sensor