By Kerry Harrison
University of Georgia
Most Georgia lawns have had plenty of rain in the past few
weeks. Take this time now, before the drying heat of summer
arrives, to check and fix any problems with your home
irrigation.
Make sure the sprinkler heads are properly adjusted and not
spraying too far out or too close in. Look for signs of broken
risers beneath the sprinklers. Sometimes this is obvious: You’ll
have a traffic-stopping geyser. A cracked riser will allow water
to boil up around the sprinkler.
Inspect the sprinkler riser wiper seal, the soft plastic seal
around the pop-up riser stem, for leakage. A small amount of
water emitting past the wiper seal is acceptable while the
system is running. Too much flow-by while a system is operating,
though, indicates a damaged seal.
Many times people will replace a sprinkler because it leaks
between the wiper seal and pop-up stem after the system has
turned off. But this leakage doesn’t indicate a problem. If
water drains out after the system has turned off and eventually
stops, the valve is fine.
For spray heads with filters under the nozzle, hold the pop-up
stem and unscrew the nozzle carefully. A damaged nozzle may
result in an uneven spray pattern. A damaged pop-up stem will
result in a poorly performing wiper seal. Remove and clean the
filter.
To clean clogged nozzles, flush with water or lightly tap on a
firm surface. While the filter is out, turn on the irrigation
zone and flush out the sprinkler body.
Reinstall the filter and nozzle, turn on the zone and recheck
for effective coverage. Make all of the necessary adjustments to
cover the area properly. While the water is on, inspect the
other heads in the zone for proper operation.
To clean filters installed under the pop-up stem, unscrew the
cap from the body. Don’t allow dirt to fall into the sprinkler
body while the riser assembly and cap are removed.
The filter is at the bottom of the riser assembly. Remove it and
flush it with water. Before reinstalling the assembly, run a
small amount of water through the system to flush any debris
caught in the sprinkler body.
It’s critical that broken or poorly performing sprinkler heads
be replaced. When a specific sprinkler isn’t operating as
designed or if water is flowing freely because of a worn wiper
seal, the performance of all the other heads in the zone is
affected. Water flowing unchecked past a wiper seal will cause a
loss in pressure and affect the other sprinklers’ performance.
Georgia has no mandatory, statewide, watering restrictions now.
But there are some guidelines.
If your street address is an odd number, you’re asked to water
on Sunday, Tuesday and Thursday. If it’s an even number, you’re
asked to do it on Monday, Wednesday and Saturday. There’s no
outside watering on Friday.
(Kerry Harrison is an Extension Service irrigation engineer
with the University of Georgia College of Agricultural and
Environmental Sciences.)
