force main


Also found in: Acronyms.

force main

[′fȯrs ‚mān]
(civil engineering)
The discharge pipeline of a pumping station.
References in periodicals archive ?
The East Chapin sewer force main project will relieve pressures on the existing sewer force main and pump stations, the release said.
NASSCO's Pressure Pipe Committee has developed a comprehensive Force Main Technology Summary Matrix, available at nassco.org/publications.
Moylan Jr., commissioner of public works and parks, said the project involves installing about 3,800 feet of a "PVC slip-liner" into the existing 24-inch-diameter pre-cast concrete pipe, or force main.
It was pulled off without a hitch when the city and county of Honolulu completed one of the longest and largest sewer force main installations in the United States using horizontal directional drilling (HDD) and microtunneling trenchless technologies.
CDM will perform hydraulic analyses and design services for the Creve Coeur pump station and a 19,000-foot force main, increasing capacity from 43 to 129 mgd.
The project has RJN providing preliminary and final design, bidding assistance and construction assistance services for sewer improvements including design of 10,700 continuous linear feet of gravity sewer increasing diameter up to 30 inches; and design of a new 19,500 linear feet 24-inch parallel force main. The project will take 18 months to complete and be broken up into multiple phases.
Historically, wastewater system operators have found it difficult to take a pro-active approach to force main maintenance because accessing buried pipes is difficult and costly and the use of conventional closed circuit television (CCTV) inspection equipment usually means the system must be shut down which requires a bypass system.