Continuing Education Session 2 (Part 2 of 4)

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Part 2 of 4 of the Continuing Education Session 2 Course offered by Cape Cod Plumbing School. Visit www.capecodplumbingschool.net for more information.

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Slide 1: 

Welcome to the Grease Traps Course as part of the 6 Hour Continuing Education Course SESSION 2! Please read the following instructions to fully understand how to take the course: To go back to a previous slide Click on this side of the screen To go to the next slide Click on this side of the screen Audio for each slide will AUTOMATICALLY PLAY And CANNOT be paused. If you need to hear it again, simply go to the next slide, then go back to the slide you wanted to hear again. Your workbook has a page number next to each fill in the blank question. That number corresponds to the PG # at the top right corner of each slide. Look at the PG # on the slide if you lose your place on the workbook. PG # When you are finished with this part of the course, a final slide will display a link. Click the link to move on to the next part of the course. To make the presentation full screen, click the square icon on the bottom right corner just outside this presentation box. Fullscreen Button

GREASE INTERCEPTORS : 

GREASE INTERCEPTORS INSTALLATION, SIZING AND REQUIREMENTS

WHAT IS A GREASE INTERCEPTOR? : 

WHAT IS A GREASE INTERCEPTOR? GREASE INTERCEPTOR - A SEPARATOR THAT SHALL BE PROVIDED TO PREVENT THE DISCHARGE OF FATS, OILS AND GREASE FROM ENTERING THE BUILDING DRAINAGE SYSTEM, PUBLIC SEWER, SEWAGE TREATMENT PLANT, OR OTHER SEWAGE TREATMENT PROCESSES. PG 1

TERMINOLOGYTRAPS VS. INTERCEPTOR : 

TERMINOLOGYTRAPS VS. INTERCEPTOR GREASE TRAPS AND INTERCEPTORS SERVE THE SAME PURPOSE AND THEIR NAMES ARE OFTEN USED INTERCHANGEABLY. 248 CMR DEFINES THEM AS FOLLOWS: GREASE TRAP- A PASSIVE INTERCEPTOR WHOSE RATED FLOW IS 50 GPM (189 L/m) OR LESS GREASE INTERCEPTOR- A PASSIVE INTERCEPTOR WHOSE RATED FLOW EXCEEDS 50 GPM (189 L/m) HOWEVER, THE INDUSTRY STANDARD NOW REFERS TO BOTH SEPERATORS AS INTERCEPTORS AND REQUIRES THEM TO BE INSTALLED AS INTERCEPTORS REGARDLESS OF FLOW RATE. PG. 2

Slide 5: 

GREASE INTERCEPTORS (TWO TYPES) HYDROMECHANICAL- DESIGN TYPE INCORPORATES AIR ENTRAPMENT, THE BUOYANCY OF GREASE IN WATER AND HYDRO MECHANICAL SEPARATION WITH INTERIOR BAFFLING FOR GREASE, FOG (FATS, OILS AND GREASE) SEPARATION. HYDROMECHANICAL GREASE INTERCEPTORS CONTINUOUSLY SEPARATE THE FOG AT THE VELOCITY IT ENTERS THE INTERCEPTOR. GRAVITY- DESIGN TYPE INCORPORATES TWO OR MORE COMPARTMENTS IN SERIES, A MINIMUM VOLUME OF 300 GALLONS AND USES ITS LARGER VOLUME OF WATER TO SLOW THE FLOW VELOCITY DOWN ALLOWING THE TIME REQUIRED FOR THE BUOYANCY OF GREASE IN THE WATER TO CAUSE SEPARATION. THAT IS WHY THE PHYSICAL SIZE OF THE GRAVITY GREASE INTERCEPTOR IS SO MUCH GREATER THAN THE PHYSICAL SIZE OF THE HYDROMECHANICAL GREASE INTERCEPTOR. PG. 3

Slide 7: 

HYDROMECHANICAL- LOCATED INSIDE CLOSE TO FIXTURE GRAVITY- LOCATED OUTSIDE AND UNDERGROUND SIZE BASED ON GALLONS PER MINUTE OF FLOW (GPM) THE INTERCEPTOR CAN RECEIVE AND STILL REMOVE 90% OF GREASE. COMMON SIZES: 10,15,20,25,35,50,75,100 GPM SIZE BASED ON ACTUAL VOLUME OF WATER INTERCEPTOR WILL HOLD EXPRESSED IN GALLONS. COMMON SIZES: 300, 500, 750, 1000, 1250, 1500, 2000, 3000 GALLONS PG 4

WHERE ARE GREASE INTERCEPTORS REQUIRED? : 

WHERE ARE GREASE INTERCEPTORS REQUIRED? RESTAURANTS CAFETERIAS HOTELS HOSPITALS INSTITUTIONS FACTORIES CLUBS BARS SERVING FOOD ALL COMMERCIAL KITCHENS; FOOD AND MEAT PACKING AND PROCESSING ESTABLISHMENTS, SUPER MARKETS, BAKERIES, AND OTHER ESTABLISHMENTS WHERE FATS, OILS AND GREASE MAY BE INTRODUCED INTO THE BUILDING SANITARY DRAINAGE SYSTEM. PG. 5

FIXTURES REQUIRING PROTECTION : 

FIXTURES REQUIRING PROTECTION POT SINKS SCULLERY SINKS *SINK DEPTHS >10" FLOOR DRAINS* FLOOR SINKS AUTOMATIC DISHWASHERS PRE-RINSE SINK SOUP KETTLES WOK STATIONS HOOD WASH UNITS PLUMBING FIXTURES TO BE PROTECTED BY GREASE INTERCEPTORS SHALL INCLUDE: * FLOOR DRAINS THAT MAY ENCOUNTER GREASE RESIDUE AND ARE SPECIFICALLY DESIGNED FOR THIS PURPOSE MAY CONDUCT GREASE TO AN OUTSIDE GREASE INTERCEPTOR (248 CMR 10.09 2.E) PG. 6

PIPE NOT PROTECTED BY INTERCEPTOR : 

PIPE NOT PROTECTED BY INTERCEPTOR * GOOD INSTALLATION PRACTICE DICTATES NOT EXCEEDING 25’ FROM THE FIXTURE TO INTERCEPTOR Courtesy of PDI PG. 7

FLOW CONTROL DEVICE : 

FLOW CONTROL DEVICE ALL GREASE INTERCEPTORS OTHER THAN GRAVITY SHALL BE EQUIPPED WITH A FLOW CONTROL DEVICE. THE FLOW CONTROL DEVICE IS DESIGNED TO REGULATE THE FLOW AND DISCHARGE RATE OF WASTE WATER THROUGH THE INTERCEPTOR. FLOW CONTROL IS REQUIRED TO BE INSTALLED BETWEEN THE FIXTURE AND THE GREASE INTERCEPTOR IN ACCORDANCE WITH MANUFACTURERS INSTRUCTIONS. FLOW CONTROL MAY HAVE VENTED (AIR INTAKE) OR BE OF AN INTEGRAL NON-VENTED DESIGN. VENTED FLOW CONTROLS MAY NOT TERMINATE 6” ABOVE THE FLOOD LEVEL RIM OF FIXTURE. FLOW CONTROL MUST BE BACKVENTED TO A VENT STACK, STACK VENT, OR TERMINATE TO FREE AIR. SEE FOLLOWING DIAGRAM PG. 8

INSTALLATION(HYDROMECHANICAL INTERCEPTOR) : 

INSTALLATION(HYDROMECHANICAL INTERCEPTOR) GREASE TRAP FLOW CONTROL SANITARY DRAINAGE VENT SANITARY WASTE STACK >10" * DO NOT REQUIRE P-TRAPS. FIXTURE TRAP BACK VENT PG. 9 FIG. 1 A B

Slide 14: 

ILLEGAL INSTALLATION FLOW CONTROL VENT CAN NOT TERMINATE IN A RETURN BEND 6" ABOVE FLOOD LEVEL RIM OF FIXTURE. PG. 10 NOT ACCORDING TO CODE

MORE THAN ONE FIXTURE : 

MORE THAN ONE FIXTURE ONE INTERCEPTOR TO SERVE MULTIPLE FIXTURES IS RECOMMENDED ONLY WHERE FIXTURES ARE LOCATED CLOSE TOGETHER. IN SUCH INSTALLATIONS, EACH FIXTURE SHOULD BE TRAPPED AND BACK VENTED. THE FLOW CONTROL VENT MUST INTERSECT THE SANITARY VENT. PG 11

INSTALLATION WITH DISHWASHER : 

INSTALLATION WITH DISHWASHER SANITARY DRAINAGE VENT GREASE TRAP EXTERNAL FLOW CONTROL VENT DISHWASHER GRAVITY DRAIN BRANCH * 8-FEET MAX DISTANCE EXTERNAL FLOW CONTROL SANITARY WASTE STACK BACK VENT AIR GAP PG 12

INSTALLATION(GRAVITY TYPE INTERCEPTOR) : 

INSTALLATION(GRAVITY TYPE INTERCEPTOR) PROVISIONS- THE ENTIRE INSTALLATION WITHIN THE PROPERTY LINE SHALL COMPLY WITH 248 CMR 10.03 DEDICATED SYSTEMS. THE INSTALLATION SHALL BE DESIGNED BY A REGISTERED PROFESSIONAL MECHANICAL ENGINEER. THIS INSTALLATION SHALL REQUIRE A CHAMBER VENT WHICH SHALL: BE PIPED TO THE INSIDE OF THE BUILDING NOT BE LESS THAN FOUR INCHES MINIMUM DIAMETER. PG 13

MAINTENANCE : 

MAINTENANCE GREASE AND ACCUMULATED SOLIDS SHALL BE REMOVED FROM INTERCEPTORS AND DISPOSED OF IN ACCORDANCE WITH APPLICABLE FEDERAL, STATE AND LOCAL HEALTH REQUIREMENTS BY THE OWNER OR HIS/HER AGENT. FEDERAL, STATE AND LOCAL LAWS, REGULATIONS AND BY-LAWS MAY REQUIRE MONITORING AND REGISTRATION OF INSTALLED INTERCEPTORS. THE LOCAL BOARD OF HEALTH OFFICIAL(S) OR SIMILAR AUTHORITY HAVING JURISTICTION MAY REQUIRE OTHER METHODS OR PROGRAMS TO MONITOR MAINTENANCE. PG 14

LAMINATED SIGN : 

LAMINATED SIGN A LAMINATED SIGN SHALL BE STENCILED ON OR IN THE IMMEDIATE AREA OF THE GREASE INTERCEPTOR IN LETTERS ONE INCH HIGH. THE SIGN SHALL STATE THE FOLLOWING IN EXACT LANGUAGE. PG 15

SIZING, TESTING AND RATING : 

SIZING, TESTING AND RATING GREASE INTERCEPTORS SHALL NOT BE INSTALLED UNLESS SIZED, TESTED AND CERTIFIED ACCORDING TO: PDI-G101 OR ASME A112.14.3 OR ASME A112.14.4 GREASE TRAPS AND INTERCEPTORS MUST BEAR THE CERTIFICATION SEAL OF THE PLUMBING AND DRAINAGE INSTITUE (PDI) OR ASME. PG 16

PROCEDURE FOR SIZING HYDRO MECHANICAL GREASE INTERCEPTORS INSIDE BUILDINGS : 

PROCEDURE FOR SIZING HYDRO MECHANICAL GREASE INTERCEPTORS INSIDE BUILDINGS STEPS: 1) DETERMINE CUBIC CONTENT OF FIXTURE. LENGTH (in) X WIDTH (in) X DEPTH (in) 2) DETERMINE CAPACITY IN GALLONS. CUBIC CONTENT (in) ÷ 231 cu in = GALLONS 3) DETERMINE ACTUAL DRAINAGE LOAD. DRAINAGE LOAD = 75% OF TOTAL CAPACITY CAPACITY IN GALLONS X 0.75 = DRAINAGE LOAD 4) DETERMINE FLOW RATE. IF FIXTURE DRAINS COMPLETELY IN 1 MIN THEN FLOW RATE IS BASED ON A 1 MIN DRAINAGE PERIOD. SIZE IS BASED ON THIS NUMBER IN GPM PG 17

SIZING EXAMPLE : 

SIZING EXAMPLE WHAT SIZE INTERCEPTOR WOULD BE REQUIRED FOR THIS FIXTURE? 48" 24" 12" PROCEDURE- 1) DETERMINE CUBIC CONTENT 12" x 24" x 48" = 13,824 cu in 2) DETERMINE TOTAL CAPACITY IN GAL 13,824 cu in ÷ 231 cu in = 59.8 gallons 3) DETERMINE ACTUAL DRAINAGE LOAD 59.8 gallons x 0.75 = 44.9 gallons 4) DETERMINE DRAINAGE PERIOD AND FLOW RATE 1 MIN DRAINAGE PERIOD = 44.9 gal / 1 min = 44.90 GPM 2 MIN DRAINAGE PERIOD = 44.9 gal / 2 min = 22.45 GPM 5) SELECT THE INTERCEPTOR WHICH CORRESPONDS TO THE FLOW RATE CALCULATED PG 18

Slide 23: 

PROCEDURE FOR SIZING GRAVITY GREASE INTERCEPTORS OUTSIDE BUILDINGS STEPS 1) FOLLOW PROCEDURE AS IF FOR SIZING A HYDROMECHANICAL INTERCEPTOR. COMPUTE GPM FLOW FOR ALL FIXTURES ENTERING INTERCEPTOR. EXAMPLE: 20 GPM 2) MULTIPLY FLOW RATE BY DETENTION TIME. (TIME FOR GREASE TO SEPERATE BY BUOYANCY). DETENTION TIME IS A CONSTANT AND IS ALWAYS 30 MINS 20GPM X 30 MINS = 600 GALLON GRAVITY INTERCEPTOR PG 19

FINAL NOTES : 

FINAL NOTES REMEMBER- THE PLUMBING CODE 248 CMR DOES NOT SPECIFY THE SIZING OR INSTALLATION REQUIREMENTS FOR GREASE TRAPS. 248 CMR SAYS THAT GREASE TRAPS HAVE TO BE SIZED TESTED AND CERTIFIED ACCORDING TO: PDI-G101 OR ASME A112.14.3 OR ASME A112.14.4 * YOU CAN PRINT A COPY OF PDI-G101 AT: www.pdionline.org/pdi-g101.pdf IT IS A GOOD IDEA TO CHECK WITH THE AUTHORITY HAVING JURISTICTION BEFORE INSTALLING ANY INTERCEPTORS TO ENSURE THAT YOUR CALCULATIONS AND SPECIFICATIONS ARE SATISFACTORY AND ARE IN COMPLIANCE. PG 20

Slide 27: 

SUPPLEMENTAL INFORMATION PG 45 Pex tubing may be used for hot and cold water distribution in residential type buildings up to and including 3 stories. 10.06-7 PEX tubing shall not be installed closer than 24 inches to any connection to a direct fired hot water heater. 10.06-7 The use of CPVC plastic piping is not permitted on the drip connection from a temperature pressure relief valve. PG 126 10.06 5 A Stack venting does NOT require all plumbing fixtures are in the same room. 10.16 9 A A fixture drain would not be used as a wet vent in a kitchen sink. PG 197 A E PG 21

Slide 28: 

You have completed this part of the course. The next part is Continuing Education Session 2 - Part 3 On your computer keyboard, please press the “Esc” key located at the top left corner. This will take you out of fullscreen mode. This is required if you want to continue to the next part of the course. Once you have pressed the “Esc” key and are out of fullscreen mode, please click the link below to continue: Continuing Education Session 2 (Part 2 of 4)

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