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Orono Elementary and Intermediate School Phase H Renovations Plumbing Plan No. 096475 Page 2 April 13,2009 b. The method of connection to the horizontal gravity line shall be from the top through a wye branch fitting(see Minnesota Rules,part 4715.2440, subpart 2). 4. Verify that the new vent that will be provided for the existing floor drain in the lower elevation area in Room No.B002 is taken off above the centerline of the pipe and rises ertically, 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).It appears that the vent shown on Sheet No M202-R2-3 is flat vented.Refer to the Venting of Floor Drains handout for additional information. 5. The plans show that some fixtures will be connected to existing waste d vent piping nearby.Verify that these fixtures are trapped and vented in accordance with Minnesota R les,part 4715.2620. 6. Verify that the building is served by a full-sized vent stack that is continuous in size from its base to its terminal(see Minnesota Rules,part 4715.2520, subpart 1). 8. Verify that the following cleanout requirements are met: a. Each horizontal drain branch,including floor drain branches, shall be provided with a cleanout at its upper terminal,except that a fixture trap or a fixture with an integi al trap,readily removable without disturbing concealed piping,may be accepted as a cleanout equivalent for this purpose(see Minnesota Rules,part 4715.1000). b. 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 's an increase in pipe size from 2 inches to 3 inches and from 3 inches to 4 inches. 9. It is recommended that a cleanout be provided where new waste and v nt piping connects with existing plumbing to facilitate required testing of the new installation. 10. Showers and combination showers-baths shall be equipped with anti-s ald control valves. These valves must be of the thermostatic or pressure balance type in accordance with ANSI/ASSE Standard 1016-96(see Minnesota Rules,part 4715.1380,subpart 5). The installer must verifY that the maximum temperature setting from the factory is set or adjusted in accordance with the stand rd. It is recommended that the maximum setting of the discharge temperature does not exceed 110 degrees F. 11. The pipe hanger and support spacing requirements listed in Details 814 do not comply with Minnesota Rules,part 4715.1430.Above-grade horizontal plumbing piping must be supported as follows(see Minnesota Rules,part 4715.1430,subpart 4): a. Plastic pipe: at least every 32 inches. b. Cast-iron: at least every 5 feet; or 10 feet when ten foot lengths of pipe are used. c. Copper tubing(1'/4-inch or less): at least every 6 feet. d. Copper tubing(1%i-inch or over): at least every 10 feet. 12. In all buildings other than dwellings,shutoff valves shall be installed hich permit the water supply to all equipment in each separate room or to each individual fixture to be sh at off without interference with the water supply to any other room or portion of the building(see Minnes 3ta Rules,part 4715.1800, subpart 6).