g.

1 1.) GENERAL Chapter M RESTAURANT SINKS Code References a. Drain, trap & vent size Table and Table and Table b. Installation Appendix Comm (5)(c) See following drawings in this chapter. c. Sink or compartment size See Chapter (A) of the Wisconsin Food Code (page M 2). d. Pre-wash sink See Chapter of the Wisconsin Food Code (page M 2). e. Number of compartments See Chapter ATCP75 of the Wisconsin Food Code (Agriculture, Trade & Consumer Protection Code) reprinted at the end of this chapter (after Q & A. f. Prep sinks See Chapter of the Wisconsin Food Code (page M 2). g. Hand wash facilities See the following WFC Chapters: Chapter WFC Handsink, Water Temperatures & Flow, (A)(B)(C)(1 )(2) & (D) Chapter WFC Handsink. C, Numbers & Capacities (A)(B)(C) Chapter WFC , Using a Handsink (A)(B)(C) A reprint of a letter dated February 14, 2006 confirming types of acceptable hand sink faucet controls is reprinted at the end of this chapter (after Q & A).

2 Also see page M8 for ADA installation measurements of an approved hand sink. 2.) INTERIOR grease interceptor SIZING FOR RESTAURANT SINKS/DISHWASHERS See page M 6 of this chapter. 3.) EXTERIOR grease interceptor SIZING FOR REST AU RANT KITCHENS See Interceptors & Catch Basins, chapter H page H 14 & H 15, in this manual for installation & sizing. M1 ChapterM RESTAURANT SINKS Code References INTENTIONALLY LEFT BLANK M2 Food Preparation Sinks Chapter M RESTAURANT SINKS Code References WISCONSIN FOOD CODE (A) Except as specified in (B), in NEW FOOD ESTABLISHMENTS and at the time of change in OPERATOR of an existing FOOD ESTABLISHMENT that has FOOD items that require washing or thawing a separate sink for FOOD PREPARATION that meets the requirements specified in , and shall be provided. (B) EXISTING FOOD ESTABLISHMENT needing a sink to PREPARE, wash or thaw FOOD as specified in and (B), may use a SANITIZING compartment of a WAREWASH sink provided the following conditions are met: (1) The installation of a separate FOOD PREPARATION sink would not be possible because adequate space is not available; (2) The sanitizer sink compartment is discharged via air gap as specified in ; (3) APPROVAL is obtained from the REGULATORY AUTHORITY to use the SANITIZER sink compartment for FOOD PREPARATION; and (4) Cleaned and SANITIZED as specified in (B).

3 Note: When a food preparation compartment is an integral part of a multi-compartment scullery sink, a suitable insert or utensil shall be used in the food preparation sink compartment to prevent cross contamination from adjacent compartments. A suitable insert or utensil is one that terminates above the rim of the compartment preventing contamination caused by overflow from adjacent sink compartments. M3 Chapter M RESTAURANT SINKS Interior grease Interceptors & Scullery Sinks ~ 11/4" 11t4"A----L -r~-------, 'j : Pre-wash Wash Rinselsanitize I 11/4""l I 2" I I I 1--+-12" Max. A maximum of 12" horizonal inlet pipe may be submerged. See Comm. (S)(d) 7. grease interceptor sized as per Comm. (S)(d) 1. 2. 3. See criteria for sizing the grease interceptor on page M6 of this chapter. When a four (4) compartment sink is one unit, the pre-wash and wash compartment may be connected with a continuous waste and the rinse and sanitize compartments may also be connected with a continuous waste or with a double tee-wye as shown above.

4 Note: A scullery sink of one, two, three or four compartments has a DFU value of 3. Pre-wash with overhead spray t-,r1 1/2" 1 1/4" rl-----L-,~-----, 1 : I Wash Rinsel Sanitize I 1 1 1/4" I I "I I I I 1--+-12" Max. In lieu of the additional sink for pre-washing, a well-type garbage disposal with overhead spray wash may be provided. However, an additional handwash sink must be provided in the food preparation area. The sink compartment size shall be large enough to accomodate immersion of at least 50% of the largest utensil or equipment being cleaned or sanitized. See (B) in the food code. Note: The rinse, sanitize and FWG compartments have the option of by passing a grease interceptor . If ~ they pass through the grease interceptor , then the grease interceptor should be sized accordingly. M4 Chapter M RESTAURANT SINKS Interior grease Interceptors & Scullery Sinks 11/4"-J------/.

5 2.~-~--------., : 1 Wash Rinse Sanitize : I I I 2"CO~ I I 2" 1--1--12" Max. Note: If sink strainer is 1-112'', then the waste pipe and trap may also be 1-1/2". A maximum of 12" of horizontal inlet pipe may be submerged. See Com (5)(d)7 .. grease interceptor sized as per Com (5)(d) See criteria for sizing grease interceptors on page M6 of this chapter. When a three (3) compartment sink is one unit, the wash and rinse compartment may be connected with a continuous waste. The rinse and sanitize compartments may also be connected with a continuous waste or with a double tee-wye as shown below. Note: A scullery sink of one, two, three or four compartments has a DFU value of 3. 1-1 1/4" 11/4"-<i _____ /_r ~-----, : 1 114 .. ~ Wash Rinse! Sanitize 2" 2" I 1 I 2"COI-1 dry I 1--1--12" Max. The outlet pipe is dry. The inlet pipe upstream of the 45 fitting is dry. The pipe downstream of the same 45 fitting is wet (or submerged).

6 This portion of the pipe from the 45 fitting to the grease interceptor shall not exceed 12". The sink compartment size shall be large enough to accomodate immersion of at least 50% of the largest utensil or equipment being cleaned or sanitized. See (B) in the WI food code. Note: The rinse, sanitize and FWG compartments have the option of by passing a grease interceptor . If any one of the compartments pass through the grease interceptor , then the grease interceptor should be sized accordingly. MS Chapter M RESTAURANT SINKS Interior grease Interceptors & Scullery Sinks If the food establishment demonstrates the inability to effectively clean equipment and utensils, the Department or its agent municipality or county may require a 4-compartment sink or an additional pre-wash sink for pre-cleaning as specified in Chapter of the Wisconsin Food Code. ')v 1 1/4" 1 1/4" 11/4"-<i ___.

7 F ___ r--v.:. , ! PF ~ ! Wash Rinse Sanitize ~ 2" 1; -----2" Flow control -lr---1f-12" Max. When a pre-wash and wash sink do not have a disposal connected to it, the sinks may be common vented as shown above. Note: The size of the drain for the food waste grinder is determined by the size of the disposal outlet. The minimum size waste pipe for the pre-wash sink with a disposal would be sized as per the drain opening for the sink or the disposal. ( It could be 1-1/2" or 2".) It should also be noted that exterior ""'-. grease interceptors should be installed to serve the entire kitchen area when situations allow this to ) occur. Note! When flow controls are required for grease interceptors, they shall be installed as per com (5)(d) 1 114, 1 114, 11/4"_/},---L----~- , 11/4" "'' !/1 1/4" Pre-wash r Wash Rinse Sanitize 1/ 2" 2" r 1 I I I I I I I I 1-""""'-----, I I The wash compartment of a scullery sink shall discharge through a grease interceptor .

8 Note: The wash and the rinse compartment may discharge through a grease interceptor . If both compartments pass through the grease interceptor , then the grease interceptor should be sized accordingly. The FWG may discharge through the grease interceptor or it may by-pass it as shown in the drawing above. See Com (5)(b) M6 Chapter M RESTAURANT SINKS Interior grease interceptor sizing for restaurant sinks: Step One: Determine the length, width and depth of the compartment discharging through the grease interceptor . ( Example: 16" x 20" x 14" deep)= CU IN 16" x 20" X 14" = 4480 CU IN Step Two: Divide the cubic inches by 231 which will equal gallons. 4480 CU IN+ 213 = gallons (rounded to 20 gallons) Step Three: Multiply the number of gallons created by Step Two by .75. 20 gallons x .75 = 15 GPM flow which meets the code derived requirements. Step Four: The minimum size of an interior grease interceptor for the above sink shall be capable of accommodating a flow of 15 gallons per minute.

9 Note! A Schier No. PATG-1815 Trapper II will provide a grease trap with 15 GPM flow rate and a grease capacity of 60 lbs. which will meet the code requirements. Step Five: If two (2) compartments of the three or four compartment sink flow through the grease interceptor , multiply step four (15 gallons x 2) times 2 to equal a total discharge through the grease interceptor of 30 GPM. A Schier No. PATG-2420 Trapper II will accommodate a flow of 30 GPM which will meet the code requirements. Sizing of an Interior grease interceptor for a Dishwasher: (Size & Install Per Manufacturers Requirements) If a dishwasher is discharging through a grease interceptor it is sized as follows: Gallons per rack x racks per hour x .5 = GPM Example: gallons per rack x 40 racks per hour x .5 = 24 GPM A Schier No. PATG-2025 grease interceptor would provide grease removal for the dishwasher shown above.

10 If you were to install one grease interceptor for the sink and the dishwasher shown above it would be as follows: Sink = 15 GPM + Dishwasher = 24 GPM Total GPM = 39 GPM Provide a Schier No. PATG-2824 Trapper II grease interceptor which will provide an interceptor capable of a 40 GPM flow rate and a grease capacity of 180 lbs. M7 Chapter M RESTAURANT SINKS Food Preparation Sinks Comm. (9)(g) 6. Open culinary sink compartments for thawing or washing food shall discharge to the sanitary drain system through an independent connection by means of an air gap. The fixture drain upstream of the air gap shall not exceed a length of 30". TWO COMPARTMENT FOOD PREP SINK PREP SINK 1: 36" Max. Comm (4)(b) a. I I 36" Max. Comm (4)(b) a. I 1 1/2" Sized by opening on food _L waste grinder Air-gap Air-gap T PREP SINK r I 1 1/4" II I I M8 I T r 4" 36" Max. Comm (4)(b) a. 3" :;11/4" I L= PREP SINK I I I_\.