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Orono Station West Plumbing Plan No.PLB 1508-00306 Page 2 September 9,2015 d. Cappuccino machine. e. Slushie Machine. Each fixture or piece of equipment must be protected individually. A single backflow preventer may not serve more than one piece of equipment. The Watts.Model SD3 is an example of a stainless steel double-cheek valve with an intermediate atmospheric vent(DC'ViAV)listed to ASSE Standard 1022.which is approved for the installations listed above. Please note that the Watts.Model 90.(DCViAV).listed to ASSE 1012(approved for the noncarbonated installations listed above).does not comply with the January 4.2014.Reduction in Lead Drinking Water Act. The Watts.Model 9BD does not appear to be listed to ASSE Standard 1012 or 1022 3 Based on the Minnesota Plumbing Code.a plumbing system includes all potable water supplies.distribution pipes.and potable water treatment and using equipment(see Minnesota Rules,part 4715.0100.subpart 81). All portions of the water treatment and water distribution systems up to the beverage dispensers must be installed by a licensed and bonded plumber. 4. Indirect waste pipes from appliances,devices,or equipment not regularly classed as plumbing fixtures,but which are equipped with drainage outlets,must he trapped.but the traps need not be vented. The waste pipe must be at least 3 4 inches in size.but not less than the size of the outlet or tail piece of the equipment served (see Minnesota Rules.part 4715.15101. 5. A full-way valve must be provided on the cold water supply line to the water heater(see Minnesota Rules. part 4715.1800). 6. Tankless-and instantaneous-type water heaters require pressure relief valves only. instantaneous electric water heaters that have UL approval for use without a relief vale,and that have space containing the heating element of less than 3 inches in diameter.may be installed without a pressure relief valve(see Minnesota Rules,part 4715.2230). 7. A water heater with a tank capacity up to 6 gallons may be concealed in a ceiling tithe water heater has a corrosion resistant overflow pan with 4-inch minimum side walls. The outlet may not be smaller than the water heater supply line and must continue full-size to a point of safe disposal below the ceiling. Access to the water heater must not require tools see Minnesota Rules.pan 4715.2240). The relief rah pipe should be routed independently to a point of'safe disposal below the ceiling. 8. Water closets in public bathrooms must have elongated bowls with open-front seats(see Minnesota Rules. part 4715.1420). 9. The horizontal distance between cleanouts may not exceed 50 feet for pipe 3 inches or less in size,and not over 100 feet for pipe 4 inches and greater in size(see Minnesota Rules,part 4715.1010). 10. It is recommended that a cleanout be provided where new waste and vent piping connects with existing plumbing to facilitate required testing of the new installation.