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I have a sprinkler system (i.e. irrigation system) at home. Occasionally I park my car too close and it gets hit with the water. This causes horrible water spots. I've seen that some do-it-yourself car washes have a "spot free rinse", that is to say water that does not cause water spots. I assume they use some sort of filter. Is it possible to add such a filter to my system? Where would I get it? How would I install it? Does anyone know a good way to remove water spots from a car?

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closed as off topic by ChrisF Feb 12 '12 at 15:43

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3 Answers

The spot free rinse uses deionized water. This will not hurt your plants but is far too expensive to be used for agricultural purposes.

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Actually, plants may even prefer water with a bit of stuff in it. –  user558 Feb 12 '12 at 10:56
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Consider replacing the pop up onmi-directional heads closest to the drive way with directional heads that will direct the water in a pattern that won't spray on your car. Short of that, don't park there!

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Tried, so many times to get the sprinklers to only hit the grass. Alas, it seems nearly impossible to get them to hit every area of the grass and nowhere else short of redoing the entire system. But, yes, it seems don't park there is going to have to be the solution :( –  Adam Apr 15 '11 at 18:20
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Conditioning all the water to your irrigation system is probably not the right approach. For one thing, it's expensive, and for another, the conditioners might hurt the plants.

More frequent car washes might be--a good coat of wax can help the water slide right off, rather than sticking and then drying in place. If you're that concerned about car appearance it's probably worth going to a place that does good solid waxing.

You might also ask this in the Mechanics site.

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