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.► <br /> � <br /> , � <br /> Hill School <br /> Plumbing <br /> Plan No. 065378 <br /> Page 2 <br /> August 9,2006 <br /> c. When water conditioning or other point of entry water treatment equipment is installed in a water <br /> distribution system served by an on-site well, a sampling tap is needed prior to the equipment that will <br /> allow sampling of untreated water. <br /> 3. Verify that the drainage branches on the first and second floors that serve the lavatories,floor drain,and <br /> urinal increase to a minimum 2%Z-inch diameter pipe at the point of connection of the urinal.The drainage <br /> load on this section of pipe is seven drainage fixture units and the maximum dra.inage load on a 2-inch <br /> diameter pipe is six drainage fixture units(see Minnesota Rules,part 4715.2310,subpart 2). <br /> 4. At the point where a 2-inch drainage branch increases in size,a cleanout must be provided.If a fixture <br /> drainage branch is installed at the point where the pipe increases in size and if the fixture drainage branch is <br /> the same diameter as the lazger pipe,it may serve as the cleanout for this portion of the system. Cleanouts <br /> must be of the same nominal size as the pipes they serve up to 4 inches in diameter and not less than 4 <br /> inches for larger piping(see Minnesota Rules,part 4715.1010). <br /> 5. Changes in direction in dramage piping must be made by appropriate use of wyes and bends. Sanitary tees <br /> are not allowed where the direction of flow changes from either vertical to horizontal or horizontal to <br /> horizontal(see Minnesota Rules,part 4715.2410). <br /> 6. The size of the urinal supply fixture branch was not noted on the submitted riser diagram.Urinals equipped <br /> with flush valves must be provided with a 3/o-inch minimum water supply branch(see Minnesota Rules, <br /> part 4715.1730,subpart 2). <br /> 7. A full-way valve must be provided on the cold water supply line to the water heater(see Minnesota Rules, <br /> part 4715.1800). <br /> 8. Water closets in public bathrooms must have open-front seats. <br /> 9. It is recommended that a cleanout be provided where new waste and vent piping connects with existing <br /> plumbing to facilitate required testing of the new installation. <br /> 10. The polyethylene used for the water service must meet ANSI Standard B72.1 or ASTM Standards D2239 or <br /> D2737. This ma.terial may only be used up to the pressure tank and there may be no more than two feet <br /> exposed within the building(see Minnesota Rules,part 4715.0510). <br /> 11. Materials used for the building sewer must comply with the standards specified in Minnesota Rules,part <br /> 4715.0530.The PVC plastic pipe material to be used for the building sewer must meet one of the following <br /> ASTM Standards: D3034,F789,D2665, or F89L The installation must comply with ASTM <br /> Standard D2321 (see Minnesota Rules,part 4715.0530). <br /> 12. PVC plastic pipe used for the drain,waste, and vent system shall comply with ASTM Standard D 2665, <br /> D 2949 or F 891 (see Minnesota Rules,part 4715.0570 through part 4715.0600). Solvent weld joints in PVC <br /> and CPVC pipe must include use of a primer which is of contrasting color to the pipe and cement(see <br /> Minnesota Rules,part 4715.0810, subpart 2). <br /> 13. The copper water distribution piping must meet ASTM Standard B 88 (see Minnesota Rules, <br /> part 4715.0520). <br />