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Service 800 Building Plumbing Plan No. 992186 Page 2 March 30, 1999 6. Materials used for water distribution piping must comply with Minnesota Rules, part 4715.0520. All solder and flux used for the potable water distribution systems shall contain less than 0.2 percent lead. Use of 50-50 solder or flux containing more than 0.2 percent lead is prohibited in potable water distribution systems. Any solder other than 95-5 tin-antimony or 96-4 tin-silver must be specifically approved by the administrative authority prior to use (see Minnesota Statutes, Section 326.371). 7. Materials used for building sewers must comply with Minnesota Rules, part 4715.0530. 8. Materials used for water service must comply with Minnesota Rules, part 4715.0510. 9. If plastic pipe is used for the drain, waste and vent system: a. PVC plastic pipe shall comply with ASTM Standard D 2665, D 2949 or F 891. b. It must be installed in accordance with Minnesota Rules, part 4715.0580(F) and part 4715.0600. Above-grade horizontal runs of plastic waste and vent pipe cannot exceed 35 feet in total length. Above-grade vertical stacks constructed of plastic pipe may exceed 35 feet in total height only if an approved expansion joint is used. c. Solvent weld joints in PVC and CPVC pipe must include use of a primer which is of contrasting color to the pipe and cement (see Minnesota Rules, part 4715.0810, subpart 2). 10. The plumbing system shall be tested in accordance with Minnesota Rules, part 4715.2820. 11. The water piping system shall be disinfected in accordance with Minnesota Rules, part 4715.2250. 12. The combination fire protection/domestic water service shall comply with the backflow protection requirements of AWWA-M14, Chapter 6 (1990) with the exception that the following statement is deleted from section 6.3: "At any time where the fire sprinkler piping is not an acceptable potable water system material, there shall be a backflow-prevention assembly isolating the fire sprinkler system from the potable water system." The installation of reduced pressure zone backflow preventers is permitted only when periodic testing is done by a trained backflow preventer tester acceptable to the administrative authority. Testing intervals shall not exceed one year, and records must be kept. All devices must be tested after initial installation to assure that debris from the piping installation has not interfered with the functioning of the device. The devices shall be overhauled at least once every five years. The installation of new backflow preventers must be at least 12 inches, but not more than 6 feet above the finished floor or ground level. NOTE(S): 1. The scope of this project consists of the construction of a new building. The plumbing installation includes restrooms, a mop sink, a drinking fountain, and a drinking fountain. 2. This facility is served by new municipal water and sewer service connections. Authorization for construction in accordance with the approved plans may be withdrawn if construction is not undertaken within a period of two years. The fact that the plans have been approved does not necessarily mean that recommendations or requirements for change will not be made at some later time when changed conditions, additional information, or advanced knowledge make improvements necessary.