Sewer flow deposits
Sewer flow deposits
(OP)
Does anyone know of a simple formula to be used for estimating debris deposits in a gravity sewer? I'm concerned about a specific location where there is a change in slope from a very steep slope to a mild slope. I have values for seddimentation in the same line upstream of this point (this line has a different slope).





RE: Sewer flow deposits
RE: Sewer flow deposits
Yes, at most slope changes you would expect a manhole, but not always. The most dramatic case it the "inverted syphon".
RE: Sewer flow deposits
Russ Faust
Salem, OR USA
RE: Sewer flow deposits
KRS Services
www.krs-services.com
RE: Sewer flow deposits
RE: Sewer flow deposits
Gtrainor, I didn't think there were any inspectors left who actually look down the pipe after construction? In most cases the lines are flushed and then camera'd bothe after costruction and at expiration of warranty (if possible). Even the guys who trained me once upon a time rarely enter into a finished manhole, let alone peer down the pipe. That's cool!
KRS Services
www.krs-services.com
RE: Sewer flow deposits
RE: Sewer flow deposits
i'v done design and construction for several sewer projects ,we've never changed a slope without a manhole ,but i can't see why not, as long as both of the lines are at a grade steep enough to achieve self-cleansing velocities at the designed proportional depth, which is based on your very near expected flow.
self-cleansing velocities is very important ,but practically you can't always get it ,specially at the very upstream part of a system ,if you insist on flushing upstream you will end up with a massive excavation work downstream.