What I don't get is why nobody here is accounting for harsher realities than "pure water flowing in a pipe at a normal temperature". To give two examples, what happens if the pipe bursts at some point? Or needs to be replaced for whatever reason? If the fibers don't get torn at that point, you can still end up with sediment in the pipe. Wouldn't that potentially damage the fibers downstream? Would people potentially end up drinking bits of glass? I could go on but it surprises me few people here are discussing the things that could go wrong.