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Old May 31, 2016   #70
Worth1
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Join Date: Feb 2006
Location: Bastrop Texas Lost Pines Forest.
Posts: 34,153
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Okay you have some options the cheap vacume breaker the put on faucets.
And good vacuum breakers.

With a vacuum breaker they need to be I think at least 18 inches higher than your highest emitter.

I dont think you want pay what I paid for mine, it is rated for a chemical plant.
Here it is.
http://www.sprinklerwarehouse.com/Fe.../fe860-100.htm

Here is what I am thinking about but it isn't for your main line just for the water going to you fertilizer system.

http://www.sprinklerwarehouse.com/Aq...-p/avb-075.htm


Any time you connect chemicals to the water supply you should have these.
You are on a well so if it contaminates your well you are screwed.

Look up Plumbing cross connection.

Worth
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