Re: pressureless irrigation

I use the dripperlines made by agrifim http://agrifimusa.com/display.asp?guide=p44&guidepages=1&spec=spec-p92&specpages=2&install=dfj-i1&installpages=1. The lines are 1/4 which works better in a garden situation and like Steve, I am thankful to avoid punching in multiple emitters, etc. I've used this product for 10 years with alkaline water and have had no problem with clogged emitters.

See Robert Kourik's excellent (but out of print) book Drip Irrigation for Every Garden (or something close to that).

Nan



I regularly use dripperlines made by Netafim.

http://www.netafim-usa-landscape.com/Landscape/products_dripperline.php

Take a look at the information on this website - it's fairly clear.

The emitters are factory located inside the tubing. You can buy the tubing
with the emitters placed 12" on center or 18" or 24" or more. The 12"
placing is common here in gardens. I lay the dripperline on the ground and
cover it with mulch. On a slope, I would lay the tubing on the contours much
as Sean describes. You would need to use the tubing with
pressure-compensating emitters - these will work on slopes.

I now design all my projects using dripperlines in trees, groundcover and
shrubbery and sprinklers (gear-driven rotary) in turf (if turf is
unavoidable). This method is used all over here in California. I've done
work for one construction company that builds projects all over the western
u.s. They use the dripperlines on all their projects. What I like about the
dripperlines is their simplicity. There is no small spaghetti tubing  to be
kicked aside and clogged. No emitters to punch into tubing. You need to use
a flushing valve (described on the web site) and a air intake valve (also on
website) these flush debris out of the tube, and add air to avoid a vacuum
situation where debris is sucked into the emitters. It's very reliable.


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Nan Sterman			Plant Soup (TM)
PO Box 231034
Encinitas, CA 92023		760.634.2902 (voice)
NSterman@PlantSoup.Com		760.634.2957 (fax)

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