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Is there a problem of watering synthetic grass on Shabbat-

  1. If the synthetic grass has gaps or "holes" whereby the water can leak through to the earth underneath it?

  2. What if the earth underneath has been covered with some sort of "protective" spray preventing it from growing?

  3. If it were permissible to water synthetic grass, would there be any issue of maarit ayin? Or is it considered obvious to all that the grass is not real?

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Why does synthetic grass need to be watered? –  Double AA Jun 18 '14 at 14:30
maybe it doesn't need to be, but it done by happenstance when a spray system waters the real grass adjacent to the astroturf area –  Zachariah Jun 18 '14 at 14:41
I realize that the moderators of the site already looked at this question, but it seems too as psak oriented, in that it looks at too many mitigating factors. Each of those 3 points could be separate questions. –  Yishai Jun 18 '14 at 15:17
@DoubleAA obviously synthetic grass does not need to be watered. The question is if water happened to fall on it. Such as the case of washing your hands over grass –  AKayser Jun 18 '14 at 15:49

1 Answer 1

In response to issue 1 in your question.

I located this description

Turf systems can be either filled or unfilled. A filled system is designed so that once it is installed, a material such as crumbled cork, rubber pellets, or sand (or a mixture) is spread over the turf and raked down in between the fibers.

Read more: http://www.madehow.com/Volume-7/Artificial-Turf.html#ixzz356epI24D

Since the base or filling may conatin soil underneath the blades, I can see that there may be a problem with watering astro turf in such situations. If you are certain that the base is not soil, then watering is not a problem.

Regarding issue 3 - Marit Ayin - In many cases turf looks like real grass. I think most people agree to this. Make your own judgement when you watch a baseball or football game on TV. (The argument that TV distorts everything is not really true these days with HDTV.) It looks real at first. My own opinion based on this is that it would be marit ayin as it is NOT obvious to all that it's turf.

On the other hand, there could be a separate issue of "cleaning" if the turf is extremely dirty....

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Is this an answer or an extension of the details of the question? –  Isaac Moses Jun 19 '14 at 17:41
It would answer issue 1 in the question, if there was soil under the turf. –  DanF Jun 19 '14 at 18:01
I would expect an answer to this type of question to cite and reason from Halachic sources, or at the very least, explicit references to well-known Halachic concepts. Right now, this post contains more detail about the conditions described in the question and a Halachic assertion or two without support from sources or reasoning. –  Isaac Moses Jun 19 '14 at 18:21

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