Preliminary Flushing Sample Clauses

Preliminary Flushing. After satisfactory completion of pressure/leakage testing, the water main shall receive a preliminary flush. Flushing of water main shall be conducted under the supervision of North Park Water or its designee, in accordance with the approved flushing plan. The flushing shall include 100% of the newly installed water main as well as every fire hydrant installed. During the flushing operation, the direction of flow through the mains shall be reversed. All main line and hydrant valves shall be opened and closed while flushing in each direction. Flushing shall only take place between 7:30 am and 3:00 pm, Monday through Friday, excluding holidays. The flushing velocity in the main shall be a minimum of 3.0 feet/second. See Table A for recommended flows to properly flush piping. * Assuming 40 psi residual pressure in existing water main a 2-1/2" hydrant outlet will discharge approximately 1,000 gpm and 4- 1/2" will discharge 2,500 gpm. ** Number of taps on pipe based on discharge through 5 ft. of galvanized iron (GI) pipe with one 90 degree elbow.