Furthermore, if the quantity of drugs can be quickly flushed, then you're pretty small-time.
There's two types of drug dealers; those who need forklifts and those who don't.
That would be part of the reason why there is no need. It doesn’t take much to figure out the plumbing from a house to the sewage pipeline and have something to filter out the non-essentials.
That old bullsh#t of “the cops are here, quick flush the evidence” is just exactly that, BULLSH#T.
Any cop with even a partially functioning brain knows all you have to do is get your warrant, call the City Public Works department and ask them to isolate the city block, or two blocks or twenty blocks of the sewer system.
Every thing that goes down there can be recovered, hell I’ve pulled wedding rings, lockets and even false teeth out of the dip in the first manhole downstream from an address.
You just have to be willing to pay for the cities time on the job. If the packages are small enough to go down the water closet but light enough to float you just ask the city to drop screens at every street sewer junction then you serve your warrant.