I asked yestrday if anyone knew about adrain tile that does not need gravel, because it has a foam sleeve around it. I would also would like to know the best way to use drain tile in a craw space situation (7 courses new construction just starting to put up block) I will have to pump water up from a crock to remove the water.
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I don't know how a foam sleeve could eliminate the need for gravel.
If you read through these forums, you'll see there are very frequent posts about problems with moisture and crawl spaces. Now is the time to learn how to prevent those problems - Before the house is on top of it, and fixing it is too difficult.
Help Wanted: Telepath. You know where to apply.
If you are expecting a water problem due to a high water table, etc, I'd be concerned about a foam sleeve being clogged my particles that migrate with the water flow, especially if it is a clay soil or very sandy soil.
The best method to obtain a dry crawl space is to install a very effective exterior drain system. Then, and interior drain system is just icing on the cake.
You say that you will have to pump out any collected water. Is the lot pretty close to flat? For the exterior drain, the most ideal situation would be a drain tail that exits to daylight; even if you have to dig a 100' trench.
This link has some good basic info: http://www.apawood.org/pdfs/managed/A520B.pdf