Invert Matchups
Invert Matchups
(OP)
In a manhole when matching an 8-inch sewer line inlet with a larger line outlet, say 18-inch, do you match the pipe crowns or match the inverts (maybe with a 1/10' drop) or what?
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RE: Invert Matchups
RE: Invert Matchups
RE: Invert Matchups
RE: Invert Matchups
RE: Invert Matchups
RE: Invert Matchups
RE: Invert Matchups
The transition between pipe sizes is done in a manhole, which is typically about 3 or 4 feet in diameter, and often with a mandatory drop in elevation of 1 or 2 tenths of a foot. This drop is formed by sloping the channel in the manhole base and isn't generally an abrupt drop. This provides a very gradual transition and minimizes headloss and turbulence, regardless of whether you are matching crowns, inverts, centerlines or otherwise.
RE: Invert Matchups