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SECTION 02504 TESTING AND DISINFECTING WATER MAINS 1 . FILLING AND FLUSHING NEW WATER MAINS A. Prior to filling any new water main, an isolation valve (either existing or new) shall be installed between the existing water main and any new extension of the water main. The isolation valve shall be provided with a locking mechanism by the Contractor, with the key provided to the Utility Department. The valve shall remain locked in the closed position at all times except during flushing as supervised by the Utility Department and Engineer. Prior to connection of the new main to the isolation valve, the valve shall be pressure tested to 150 psi and checked for watertightness . Any valve which is found not to be watertight shall be replaced at the Contractor's expense. B . Filling of the new water main shall be by means of a temporary fill connection utilizing either of the following : 1 ) A 2-inch jumper across the isolation valve from the existing active water main to the new water main. The jumper shall be connected : to the mains using previously specified 24nch by pipe diameter tapping saddles . The corporation stop shall be 2 -inch in size, manufactured as previously specified, except that the tapping end shall be M. I . P . T. and the fill connection end shall be F . I .P . T. The jumper shall incorporate an AWWA approved and certified backflow preventer mounted a minimum 184nches above ground surface and a gate valve for regulating flow. 2) A 24nch jumper from an active fire hydrant to the new water main . The jumper shall be connected to the new main as specified above . The jumper shall incorporate a hydrant meter, an AWWA approved and certified backflow preventer and a flow regulating gate valve . The fill connection shall be used for filling the new water main and for pulling bacteriological samples from the new main. The fill connection shall be maintained in place until after filling, flushing, testing, disinfection of the new water system, and clearance for use from the Florida Department of Environmental Protection (F . D .E . P . ) has been received. After testing , the fill connection shall remain open to provide a minimum 20 psi in the new water system until clearance for use from the Florida Department of Environmental Protection (F . D . E . P .) has been received . C . Flushing of the new water main system shall be conducted under very controlled conditions . The Contractor shall provide 3 /4 -inch by pipe C AD ow n l o ad\techspec-02 504 . doc