Quote:
Originally posted by agla
You could use pvc with the two rows of holes and then pitch the pipe fast enough so that the clay does not fall out of solution.
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The theory of your statement is correct, but job conditions rarely permit the practical application of this. If you are installing drainage behind a wall, either one end of the pipe will be elevated above the footing, or the other end must be significantly lower than the footing, and an outlet must be acquired that is lower yet. On level areas this would be very difficult.
What I have been doing in this situation is lining the trench with filter fabric before the clear stone and pipe are installed. This prevents fines from contaminating both the perforated pipe and the clear stone at the same time. Also, there is a much greater surface area of filter fabric so that any clogging of it will take an extremely long time.
I've got curtain drains that were installed over 10 years ago that are working fine, and have yet to have a report of any failing. It costs a few dollars more to do it this way, but I think it is a more dependable solution.