Regrettably, there may have been something missing from your research. Solids do not remain suspended or float in liquids. Gravity causes solids, such as sand and rock particles, to sink and liquids rise to the surface. While some erosion of pipes occur, the overall method of gravity and straining do impose a substantial erosion of pipes which is not manageable. For this one, gleeaikin, more research is needed by yourself. All piping systems experience erosion. One would be surprised at the erosion of sewer piping, but the erosion is manageable in sewer piping and is also manageable for this situation.
The above sentence is incorrect.
Should read as follows:
While some erosion of pipes occurs, the overall method of gravity and straining do impose a substantially less erosion capability in pipes of these types of transfers and is manageable.
My apology .. I should proof read more.
Try checking out Google for articles on the 1/2 billion dollar Kalamazoo River clean up caused by a tar sands pipeline break.