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TRAPS, INTERCEPTORS AND SEPARATORS <br />1003.3.5 Hydromechanical grease interceptors, fats, <br />oils and greases disposal systems and automatic grease <br />removal devices. Hydromechanical grease interceptors; <br />fats, oils, and greases disposal systems and automatic <br />grease removal devices shall be sized in accordance with <br />ASME Al 12.14.3, ASME Al12.14.4, ASME Al12.14.6, <br />CSA 13481.3 or PDI G101. Hydromechanical grease <br />interceptors; fats, oils, and greases disposal systems and <br />automatic grease removal devices shall be designed and <br />tested in accordance with ASME Al12.14.3, ASME <br />Al 12.14.4, CSA B481.1, PDI 0101 or PDI G102. Hydro - <br />mechanical grease interceptors; fats, oils, and greases <br />disposal systems and automatic grease removal devices <br />shall be installed in accordance with the manufacturer's <br />instructions. Where manufacturer's instructions are not <br />provided, hydromechanical grease interceptors; fats, oils, <br />and greases disposal systems and automatic grease <br />removal devices shall be installed in compliance with <br />ASME A 112.14.3, ASME A 112.14.4, ASME A 112.14.6, <br />CSA B481.3 or PDI G101. <br />1003.3.5.1 Grease interceptor capacity. Grease inter- <br />ceptors shall have the grease retention capacity <br />indicated in Table 1003.3.5.1 for the flow -through <br />rates indicated. <br />TABLE 1003.3.5.1 <br />CAPACITY OF GREASE INTERCEPTORS' <br />TOTAL FLOW -THROUGH RATING <br />(gpm) <br />GREASE RETENTION CAPACITY <br />(pounds) <br />4 <br />8 <br />6 <br />12 <br />7 <br />14 <br />9 <br />18 <br />10 <br />20 <br />12 <br />24 <br />14 <br />28 <br />15 <br />30 <br />18 <br />36 <br />20 <br />40 <br />25 <br />50 <br />35 <br />70 <br />50 <br />100 <br />75 <br />150 <br />100 <br />200 <br />For SI: 1 gallon per minute = 3.785 L/m, 1 pound = 0.454 kg. <br />a. For total flow -through ratings greater than 100 (gpm), double the flow - <br />through rating to determine the grease retention capacity (pounds). <br />1003.3.5.2 Rate of flow controls. Grease interceptors <br />shall be equipped with devices to control the rate of <br />water flow so that the water flow does not exceed the <br />rated flow. The flow -control device shall be vented <br />and terminate not less than 6 inches (152 mm) above <br />the flood rim level or be installed in accordance with <br />the manufacturer's instructions. <br />1003.3.6 Automatic grease removal devices. Where <br />automatic grease removal devices are installed, such <br />devices shall be located downstream of each fixture or <br />multiple fixtures in accordance with the manufacturer's <br />instructions. The automatic grease removal device shall <br />be sized to pretreat the measured or calculated flows for <br />all connected fixtures or equipment. Ready access shall <br />be provided for inspection and maintenance. <br />1003.3.7 Gravity grease interceptors and gravity <br />grease interceptors with fats, oils, and greases disposal <br />systems. The required capacity of gravity grease intercep- <br />tors and gravity grease interceptors with fats, oils, and <br />greases disposal systems shall be determined by multiply- <br />ing the peak drain flow into the interceptor in gallons per <br />minute by a retention time of 30 minutes. Gravity grease <br />interceptors shall be designed and tested in accordance <br />with IAPMO/ANSI Z1001. Gravity grease interceptors <br />with fats, oils, and greases disposal systems shall be <br />designed and tested in accordance with ASME A112.14.6 <br />and IAPMO/ANSI Z1001. Gravity grease interceptors <br />and gravity grease interceptors with fats, oils, and greases <br />disposal systems shall be installed in accordance with <br />manufacturer's instructions. Where manufacturer's <br />instructions are not provided, gravity grease interceptors <br />and gravity grease interceptors with fats, oils, and greases <br />disposal systems shall be installed in compliance with <br />ASME Al12.14.6 and IAPMO/ANSI Z1001. <br />1003.3.8 Direct connection. The discharge piping from a <br />grease interceptor shall be directly connected to the sani- <br />tary drainage system. <br />1003.4 Oil separators required. At repair garages where <br />floor or trench drains are provided, car washing facilities, <br />factories where oily and flammable liquid wastes are <br />produced and hydraulic elevator pits, oil separators shall be <br />installed into which oil-bearing, grease -bearing or flamma- <br />ble wastes shall be discharged before emptying into the <br />building drainage system or other point of disposal. <br />Exception: An oil separator is not required in hydraulic <br />elevator pits where an approved alarm system is installed. <br />Such alarm systems shall not terminate the operation of <br />pumps utilized to maintain emergency operation of the <br />elevator by fire fighters. <br />1003.4.1 Separation of liquids. A mixture of treated or <br />untreated light and heavy liquids with various specific <br />gravities shall be separated in an approved receptacle. <br />1003.4.2 Oil separator design. Oil separators shall be <br />listed and labeled, or designed in accordance with <br />Sections 1003.4.2.1 and 1003.4.2.2. <br />1003.4.2.1 General design requirements. Oil separa- <br />tors shall have a depth of not less than 2 feet (610 mm) <br />below the invert of the discharge drain. The outlet <br />opening of the separator shall have not less than an 18- <br />inch (457 min) water seal. <br />1003.4.2.2 Garages and service stations. Where <br />automobiles are serviced, greased, repaired or washed <br />or where gasoline is dispensed, oil separators shall <br />2021 INTERNATIONAL PLUMBING CODE° 10-3 <br />