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Page 1 of 1 CITY OF BURLINGTON ENGINEERING DEPARTMENT 425 S Lexington Ave. Burlington, NC 27215 Memorandum 28 January 2005 JAMES M. LAURITSEN, P.E. DIRECTOR OF DEVELOPMENT & TECHNICAL SERVICES Revise the November 2004, Engineering Specifications and Standard Details as follows: Page 3, paragraph DUCTILE IRON PIPE, second sentence change to: The pipe shall be thickness Class 50 or greater. Page 9, paragraph METERS add the following to the end: WATER METER STRAINER All water meter installations 3” and larger shall have a cold water meter strainer that will strain objects greater than 3/16” diameter. The strainer shall be mounted on the inlet side of the meter to prevent objects from entering the meter and causing physical damage. Head loss at maximum meter flow as contained in AWWA C701-02 shall not exceed 3.0 psi. The strainer screen shall be made of perforated non-corrosive material shaped to give maximum rigidity against the flow stream forces. The two inch strainer shall be furnished with dual elliptical flanged connections, which are faced and drilled. Strainers three inch and larger shall be furnished with dual round-type flanged connections which are faced and drilled. Bolt circle, length and diameters shall be compatible with meter connection dimensions as contained in ANSI/AWWA C701-02. Sufficient flange bolts; nuts and gaskets shall be furnished. The strainer bodies shall have clearly visible, cast raised letters indicating manufacturer’s name, strainer pipe size and flow direction. For fire line services, strainers shall be an integral part of the water meter and shall be NFPA and FM approved and be UL listed. WATER METER DISMANTLING COUPLING All water meter installations 3” and larger shall have a dismantling coupling installed to facilitate installation and removal of the water meter. The dismantling coupling shall have flanged ends and be compatible with meter connection dimensions as contained in ANSI/AWWA C701-02. The dismantling Coupling shall have a working pressure of 150 psi, have a minimum of two inches of in-line adjustment, be made of ductile iron and have rubber polymer gaskets. The dismantling coupling shall be installed between the shut-off valve on the inlet side of the water meter and the water meter strainer. Coupling shall be restrained where required. The use of lug style restraint gland is not allowed. Dismantling Coupling shall be: 1. Smith-Blair Model 971 Non-restrained Smith-Blair Model 975 Restrained (where required by the Engineer) 2. JCM Model 309 3. Romac Industries, Inc. Model DJ400