I have a Hunter in-ground irrigation system.
In one of the zones, I have noticed a slow trickle drip down my
driveway from one of the sprinklers that continues even after the
system has been "off" for several days.

My guess is that perhaps the valve controlling that zone has a very
slow leak which would be consistent with the fact that this sprinkler
is at the lowest grade of the 4 sprinkler heads in the zone.

Does this diagnosis make sense?
If so what typically causes such a leak and can it be repaired? Or do
I need to go buy a new valve?

Thanks,
Jeff

"Jeffrey J. Kosowsky" wrote in message
...
I have a Hunter in-ground irrigation system.
In one of the zones, I have noticed a slow trickle drip down my
driveway from one of the sprinklers that continues even after the
system has been "off" for several days.

My guess is that perhaps the valve controlling that zone has a very
slow leak which would be consistent with the fact that this sprinkler
is at the lowest grade of the 4 sprinkler heads in the zone.

Does this diagnosis make sense?
If so what typically causes such a leak and can it be repaired? Or do
I need to go buy a new valve?

Thanks,
Jeff


You most likely at most need a new diaphragm for the valve. Could be just
a grain of sand on the diaphragm.

"Jeffrey J. Kosowsky" wrote in message
...
I have a Hunter in-ground irrigation system.
In one of the zones, I have noticed a slow trickle drip down my
driveway from one of the sprinklers that continues even after the
system has been "off" for several days.

My guess is that perhaps the valve controlling that zone has a very
slow leak which would be consistent with the fact that this sprinkler
is at the lowest grade of the 4 sprinkler heads in the zone.

Does this diagnosis make sense?
If so what typically causes such a leak and can it be repaired? Or do
I need to go buy a new valve?

Diagnosis is correct. Turn off local manual control valve, take screws off
top of valve unit, exposing the rubber diaphragm, clean and flush the unit
with water using the manual cutoff valve. Replace parts carefully. As the
other poster mentioned, it might just be some dirt in the unit. Could also
need a new diaphragm.

"Roger" writes:
Diagnosis is correct. Turn off local manual control valve, take screws off
top of valve unit, exposing the rubber diaphragm, clean and flush the unit
with water using the manual cutoff valve. Replace parts carefully. As the
other poster mentioned, it might just be some dirt in the unit. Could also
need a new diaphragm.

Thanks -- your explanation is very helpful. I will try the above.