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Ted,

Any manual method worth its salt is going to give you the same results as
the core aerator. Aerators using the thin spindles don't do much good.
Your sprinkler system pipes should be safe. As another poster said, flag
the sprinkler heads and give them a wide berth when aerating.

Regards,

Joe Morris

"ted" wrote in message
om...
"Roger Ramjet" wrote in message
.net...
Most towns don't have a code that covers irrigation systems. According
to
Hunter the min dept for the pipe should be 5 inches. Most core aerators
wont't go down more than 2-2.5 inches. Once in a while, when mine is
done,
the may pull out a 3 - 4 incher plug based on how moist the soil is. I
know
my irrigation pipes are not down that deep, especially in spots where
there
a significant grade change. I had my lawn areated 2 times a year, and
they
have yet to hit a pipe. I flag the sprinkler heads.


I'm only concerned about the sprinkler system. May be I should opt for
any good manual method to aerate.

does anyone have any suggestions about a good manual aeration method.
I heard that the shoes are useless. Since we're talking about a small
area I was wondering if there are any alternatives to core aerator
machine.

Another question I have is when is it a good time to do? The lawn is 3
years old and we have clay soil (zone 7b/8a).

Thanks for suggestions.