GardenGrrl's WunderBlog

Drip Irrigation and Backflow Prevention

By: GardenGrrl, 3:28 PM GMT on February 22, 2013

Yes it's that time to seriously start thinking about the yard and garden. With drought comes new ways of looking at garden design.
Many of us are going to "xeric gardening". Myself I'm leaning towards automating my garden for less work out in the heat.

Installing drip irrigation and automatic sprinklers is a great time and labor saver...after the initial installation. (ugh)

I found a great how-to web site on do-it-yourself irrigation. Lowes and some sprinkler manufactures have their own how to do it with their products info. Some will design your system for you if you send them your yard dimensions. That's nice, but check this site out first to give you a more knowledgable base to make these labor intensive and expensive yard irrigation decisions.

irrigation tutorials

Another VERY important part of installing an irrigation system is backflow prevention. Underground lawn sprinkler systems usually require a permit from the city. They will specify the kind of backflow prevention device they require.
For drip irrigation systems the city may not require a permit.

No permit does not mean backflow protection is not necessary. Backflow protection keeps the water in your house safe. For instance on toilets, all the new ballcocks/flushvalves have a vacuum breaking device. This is because prior to this people were getting blue ice cubes, intestinal problems etc. They were drinking their toilet water because of backflow.

Do you want to drink dog poop, fertilizer, pesticides? Then install a backflow preventer. Yes, even on a drip irrigation system. At the very least have a vacuum breaker on your hose bibb and a cheap pvc check valve on your discharge line to your irrigation system. This will sometimes protect you.
My two favorites are a "double check" backflow preventor. (Technically it needs to be tested every year and I differ with the web site author). And the best bang for the buck, the PVD vacuum breaker. Note it MUST be installed atleast 6 inches higher than the highest point of your irrigation system or it will not work.

Here is a link explaining backflow devices.
backflow devices

Hope you find this info helpful. Now here are some gratuatious photos of birds I have snapped recently.

Updated: 3:36 PM GMT on February 22, 2013



By: GardenGrrl, 9:37 PM GMT on February 01, 2013

This months featured feathered entertainment are my local finches. Mostly I have House Finches. Occaisionally I have winter Gold Finches that stop by so I always keep a sock of thistle seed hanging.

Goldfinches love thistle. When I was in Minnesota, the best part of my delivery route was driving by a field full of purple thistle. Bright gold birds would hang from the purple thistle dining on little black seeds.

During the winter goldfinches become a dull olive with tufts of yellow that didn't quite turn. Those are the goldfinches I get. They are still beautiful to me.

Everyone probably already knows how birds change to dull colors in winter to hide from predators. So as not to repeat that I did find a nifty article about winter bird facts and myths. Winter bird Myths

So here are some from my yard.
This is a male housefinch.

This is a female housefinch

And here are my occaisional feeder guests, the winter goldfinches.

Updated: 3:23 PM GMT on February 02, 2013


The views of the author are his/her own and do not necessarily represent the position of The Weather Company or its parent, IBM.

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