2010 - MN Dept. of Labor & Industry - report on plans

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Harvest Moon Co-op Remodel Plumbing Plan No. 101321 Page 2 March 25, 2010 4. Double wyes may not be used for drainage fittings in the horizontal position (see Minnesota Rules, part 4715.2420, subpart 3). Proper pipe slope cannot be maintained on both of the offset branches. Verify that a double wye fitting in the horizontal position is not used for the sanitary branches serving the floor drains near the Food Bar. 5. Vent connections serving floor drains, floor sinks, and trench drains must be taken off above the centerline of the pipe and must rise vertically, or within 45 degrees of the vertical, to a point at least 6 inches above the floor before offsetting horizontally(see Minnesota Rules,part 4715.2540, subpart 2). Verify that code compliant vents are provided for the vented floor drain in the produce section and for the vented floor drain near the Food Bar. Refer to the enclosed Venting of Floor Drains handout for additional information. 6. Floor drains which receive substantial amounts of liquid waste must be individually vented in accordance with Minnesota Rules,part 4715.2620 and part 4715.1300, subpart 4. 7. Cleanouts shall be of the same nominal size as the pipes they serve up to 4 inches in size(see Minnesota Rules,part 4715.1010). A cleanout must be installed where there is an increase in pipe size from 2 inches to 3 inches and from 3 inches to 4 inches. 8. Each horizontal drain branch, including floor drain branches, shall be provided with a cleanout at its upper terminal with the following exceptions (see Minnesota Rules,part 4715.1000): a. A fixture trap or a fixture with an integral trap,readily removable without disturbing concealed piping, may be accepted as a cleanout equivalent for this purpose. b. A floor drain cleanout may be omitted if the floor drain or fixture branch line is less than 5 feet in length. c. Floor drains used for shower drains,recessed slop, or similar receptors may have the full-sized cleanout installed on the individual vent pipe serving the fixture or on the fixture. 9. All pot, scullery, food prep, and bar sinks must be provided with a floor drain on the individual drainage branch serving each sink.This floor drain, or tell-tale drain,must not be equipped with a backwater valve (see Minnesota Rules,part 4715.1390, subpart 2). Verify that a tell-tale drain is provided for the two-compartment sink in the Produce Prep Room. 10. A single 2-inch trap and waste may serve the three-compartment sink if the trap is located not more than 30 inches from each compartment outlet(see Minnesota Rules,part 4715.0900). Locating the trap beneath the center compartment will meet this requirement in most instances. Pot or scullery sinks must be provided with waste outlets not less than 2 inches in diameter(see Minnesota Rules,part 4715.1390, subpart 1). 11. Water closets in public bathrooms must have elongated bowls with open-front seats, except round bowls with closed-front seats may be used in residential or dwelling-type occupancies(see Minnesota Rules, part 4715.1420). The maximum water volume per flush of a floor-mounted water closet shall be 1.6 gallons. Water closets shall comply with American National Standards Institute A112.19.6 (see Minnesota Statutes, Section 326B.43, subd.4). 12. In all buildings other than dwellings, shutoff valves shall be installed which permit the water supply to all equipment in each separate room or to each individual fixture to be shut off without interference with the water supply to any other room or portion of the building(see Minnesota Rules,part 4715.1800, subpart 6).