MN Dept of Labor/report on plans

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t e • vY' • • '• •. 'J°"• Crystal Bay Business Center II Plumbing Plan No. 087584 Page 2 June 19,2008 2. The flammable waste interceptor shall be constructed in accordance with the Minnesota Plumbing Code, Minnesota Rules,part 4715.1120. The interceptor shall include: a. A minimum holding capacity of 35 cubic feet. b. At least 3 feet of depth below the invert of the discharge pipe. c. A water seal of not less than 3 inches on the inlet and not less than 18 inches on the outlet. d. A minimum size 3-inch vent must extend separately through the roof. The vent must rise vertically or within 45 degrees of the vertical to a point at least 6 inches above the interceptor. The vent shall be constructed of approved metallic pipe material. e. Drains that discharge into the interceptor shall be designed to drain dry,and be at least 3 inches in size. f. The interceptor shall be located so it is readily accessible for service and maintenance. 3. 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. This is in reference to the RPZ connection on the water supply line to the irrigation system. 4. If a water softener will be installed,then please note,that the floor drain to receive the water softener discharge must be individually vented in accordance with Minnesota Rules,part 4715.2620,subpart 4. 5. Changes in direction in drainage piping must be made by appropriate use of wyes and bends. Sanitary tees are not allowed where the direction of flow changes from either vertical to horizontal or horizontal to horizontal(see Minnesota Rules,part 4715.2410). 6. PVC plastic pipe used for the drain,waste,and vent system shall comply with ASTM Standard D2665, D2949 or F891 (see Minnesota Rules,part 4715.0570 through part 4715.0600). 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). 7. Plastic pipe 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. 8. The cast iron specified on the submitted plans as an optional material for the drain,waste,and vent must meet the quality standards specified in Minnesota Rules part 4715.0570 through 4715.0600. No quality standard is specified for this material. 9. No material is specified for the rainwater leaders. Verify that the pipe materials to be used for the rainwater leaders will comply with Minnesota Rules,parts 4715.0540 through 4715.0560. 10. Disinfection of the potable water system must include the following(see Minnesota Rules,part 4715.2250): a. The pipe system must be flushed with clean,potable water until no dirty water appears at the points of outlet;