Question:Some manufacturers of newer types of distribution media say the size of a drainfield trench can be reduced over traditional installations using rock because the distribution media is more efficient. I have been doing that and the trenches seem to be working OK. Do you think it’s OK to reduce the length of trenches from what would be required for rock?Answer:I think the jury is still out on your question. Unfortunately, there was not a great deal of research available to establish the original numbers we now use for sizing soil absorption systems. However, those numbers have been used for
