Force main design manual

DESIGN CRITERIA AND SPECIFICATIONS FOR PRESSURE SEWERS, FORCE MAINS, GRINDER PUMPS AND APPURTENANCES BOARD OF PUBLIC UTILITIES CITY OF TULLAHOMA, TENNESSEE July 2 TABLE OF CONTENTS Detailed Specifications Section 1 Pressure Sewers and Force Mains Pages 3 - 21 Section 2 Grinder Pumps and . 50 Time (seconds). Service Authority sewer main (whether a gravity main, force main, or a low pressure force main) must apply for a service connection (see Service Connection Policy). The property owner shall be responsible to install the Grinder Pump System and Connection Facilities, and pay all related installation costs.

Section Force Main Material 83 Introduction 83 Force Main Design Buoyancy This Manual provides the design and construction standards for laterals and sanitary sewer facilities constructed within the CWA Authority. Sewer Design Guide (Revised May, ) City of San Diego Public Utilities Department Topaz Way • San Diego, CA Tel () Fax () Force Main Conditions: Hazen-Williams C: Flow Scenario: ADF(mgd) Peak (mgd) Number of Pumps= 1 Total Static Head= Coefficients for Flow Units= Flow Unit= GPM CFS GPM MGD Fric= Form= DEFINE PIPE SYSTEM Pipe Dia. Length Reach (in.) (feet) HW C Frac Q Sum K Kf Km.

With the peak flow rate determined, the force main can be sized. The velocity in the force main should be a minimum of 2 feet per second (fps) and a maximum of 5 fps. This is to keep the solids in suspension, but not to generate a large head loss through the force main. If an initial and ultimate flow rate are being used to design the force main. The Engineer shall evaluate and design the pump/force main system and select pump(s) and force main(s) to provide the required capacity and pressure. The Engineer shall develop hydraulic system curves that indicate the required pump operating conditions. System curves shall be developed for pump suction and discharge piping, and shall include all. It is not intended to address all design conditions or specialized situations. Projects in the public or private sector that were submitted for initial review after October 1, must comply with all standards in the Infrastructure Design Manual. Current IDM Requirements. Current Infrastructure Design Manual (IDM) (effective October 1, ).