Completely normal. I see this set up frequently and as noted in
Rainbird link it is designed to breakage from either lawn equipment or
people stepping on sprinkler heads. Much better that either flex-pipe
or (God forbid) rigid piper risers.
I've been using rigid pipe risers for years and have never
lost a head or had a pipe crack due to physical damage from
a mower driving over them or someone stepping on them. I think
the fact that around here we use poly pipe for the runs,
which has give, as opposed to rigid PVC, could be a factor.
I don't know why anyone would use PVC as poly is so much
easier to work with.
Thanks. It looks like this is very normal for some, and weird for others.
For me, it was a learning experience.
When I do it again, I'll change the three-elbowed riser to a four-elbowed
one for additional benefits.
the gray part with the swiveling black ends is call a swing arm
assembly. It's commonly used in this application . It's supposed to
absorb any impact it may receive in any direction up, down, or sidways
to prevent breakage. If you'll visit your local irrigation specialist
he'll explain it all to you.
remove the "not" from my address to email
On Tue, 06 Mar 2012 21:14:18 -0600, Steve Barker wrote:
I stopped by the landscape wholesaler to get a sixty pound bag of Fescue
and a gallon of roundup concentrate and asked him about it.
He said it was a very professional setup but he wasn't sure what exactly
the advantages were. He said it costs a few dollars more per sprinkler to
do it the way mine was, and most installers just skip it.
I'm glad, now that I know about it, that whoever installed mine, took the
time and effort and money to do it right!
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